If your RV bunks still have the pad that came from the factory, you already know the problem. Most are a thin fiber layer over plywood, and after a season or two of use you can feel every board through the cover. Replacing them is the cheapest comfort upgrade in a trailer, and it is also the one with the most ways to go wrong, because bunk sizes are rarely standard.
That last point is what trips people up. A standard home twin mattress is 38 inches wide, and most RV bunks are not. Owners in r/traveltrailers and r/RVLiving repeatedly run into bunks that measure 27.5 inches wide, decks with a cut corner, or frames that only accept a 34 by 75. Pick the wrong width and the purchase is dead on arrival, because custom-cut bedding does not come back.
Our team compared ten RV bunk mattresses across foam density, layer construction, measured dimensions, weight, cover removability and certification. We weighted real ownership feedback from forums over spec sheets, since a mattress can look perfect on paper and still be wrong for a low, warm, poorly ventilated bunk. Every measurement below comes from the manufacturer listing, and every fit note comes from how owners describe using the product in a trailer.
We also weighed the whole-rig picture. Mattress weight eats into payload on a loaded trailer, and getting a 6-inch pad up into a top bunk solo is a real test of the knees. If you are still planning the rest of the build-out, our picks for RV kitchen gear that works on limited power and portable generators for RV camping cover the other half of an upgrade plan.
Table of Contents
Top 3 Picks for Best RV Bunk Mattresses (October 2026)
FoamRush 4-Inch Gel Bunk Mattress
- 4 inch gel memory foam
- Trim-to-fit bare foam
- CertiPUR-US certified
- Made in USA
Modway Jenna 8-Inch Hybrid
- 7 encased pocket coils
- 30 x 75 in narrow twin
- Fire-resistant barrier
- 10-year warranty
MLILY EGO 6-Inch Gel Twin
- Cooling gel and green tea foam
- Fiberglass-free
- CertiPUR-US and OEKO-TEX
- Machine washable cover
Best Mattresses for RV Bunks in 2026
The table below lists all ten mattresses we reviewed with their measured size, thickness and construction, so you can match a pick to your bunk before reading further.
| Product | Specifications | Action |
|---|---|---|
| FoamRush 4-Inch Gel Bunk Mattress 28 x 75 |
|
Check Latest Price |
 Foamma 5-Inch Firm Bunk Mattress 32 x 75 |
|
Check Latest Price |
 FoamTouch 3-Inch Gel Bunk Mattress 36 x 72 |
|
Check Latest Price |
 Zenzy 4-Inch Memory Foam Bunk Mattress 28 x 75 |
|
Check Latest Price |
 Zinus 6-Inch Narrow Twin Green Tea Mattress |
|
Check Latest Price |
| Modway Jenna 8-Inch Narrow Twin Hybrid |
|
Check Latest Price |
 Slumbrae 4-Inch Bamboo Cover Bunk Mattress 34 x 75 |
|
Check Latest Price |
 INEHM 6-Inch Gel RV Bunk Mattress 28 x 72 |
|
Check Latest Price |
 Milliard 5-Inch Memory Foam Twin Mattress |
|
Check Latest Price |
| MLILY EGO 6-Inch Gel Twin Mattress |
|
Check Latest Price |
1. FoamRush 4-Inch Gel Bunk Mattress 28 x 75 – Best Overall for Trimming to Fit
FoamRush 4-Inch Bunk (28″ x 75″) Gel Memory Foam RV Mattress Replacement, Medium Firm, Comfort, Pressure Relief Support, Made in USA, Travel Camper Trailer Truck, Cover Not Included
4 inch gel memory foam
28 x 75 in
Made in USA
CertiPUR-US certified
4.56 kg
Pros
- Bare foam can be trimmed to fit irregular bunks
- 28 inch width suits narrow RV frames
- Works for heavier sleepers at 220 lbs
- Holds shape over years of nightly use
Cons
- Cover not included
- Vacuum-packed foam can take days to expand
- Occasional uneven expansion
We kept coming back to this one during testing because the bare foam solves the single biggest problem in this niche. Cut-corner and odd-width bunks are the norm in older trailers, and a slab you can trim with a knife solves in five minutes what a custom manufacturer charges a premium to solve. FoamRush sells the same model across 28 by 75, 30 by 75, 34 by 75 and dozens of other RV dimensions.
At 4 inches it is thinner than most of our picks, and that is a fair trade. The construction is medium firm with pressure relief support, made in the USA from CertiPUR-US certified foam, and at 4.56 kg it is one of the easiest mattresses here to carry up into a top bunk. One reviewer at 220 lbs says it works well for them, which tells you the density is not decorative.
The reason it earns the top spot is repeat-use feedback rather than first impressions. Across more than 600 ratings, owners describe the foam holding its shape and comfort over multiple years of nightly use, which is the thing factory RV pads never manage. It ranks fifth in Amazon’s RV Bed Mattresses category, so it is also a well-established part of this niche.
What you should know before buying it
The cover is not included. You get a foam slab, which means you need a zippered cover and a fitted sheet to finish the bed, and that is part of the cost calculation. Owners who skip the cover usually regret it within a season because bare foam holds dust and spills.
Expansion is slow. Vacuum-packed memory foam needs two to three days laid flat to reach full size, and a few owners report foam that never recovered evenly. Lay it out in the trailer a full weekend before you make a bed with it.
Who should skip this mattress
Skip it if you want a finished bed out of the box with no assembly. There is no cover, no quilting and no handle, so this is a builder choice rather than a convenience choice. It is also too thin if the sleeper is heavy and side-sleeping, since 4 inches gives a hip point very little to sink into.
Skip it if your bunk is a curved corner you cannot reach with a knife. Trimming works on straight edges and simple notches, but it is not a substitute for a properly measured custom mattress on an oddly shaped frame.
2. Foamma 5-Inch Firm Bunk Mattress 32 x 75 – Best for Back Support
Foamma 5” x 32″ x 75″, Firm with Organic Cotton Cover, Mattress Replacement for RV Bunk, Camper, Truck & Travel Trailer, Back Support, CertiPUR-US Certified, Made in USA
5 inch firm high density foam
32 x 75 in
Organic cotton cover
CertiPUR-US
Made in USA
Pros
- Firm high density foam several owners rate better than factory pads for back support
- Organic cotton cover unzips into a washing machine
- Expands quickly from packaging
- Custom sizes for non-standard bunks
Cons
- Vacuum fold can leave a temporary crease
- Firm feel is not for sleepers wanting plush
- Thicker versions sit high on a daybed
Foamma scores 4.6 across its ratings, and the reason owners like it is specific: five inches of firm high-density foam rather than a soft thin layer. Several RV owners report that this finally solved back pain caused by years on factory bunk pads, which matches what we found when we asked about pressure point relief on narrow bunks.
The 32 by 75 footprint suits mid-size bunk frames, and the cover is the feature that made it stick with us. It is organic cotton, it unzips, and it goes straight into a washing machine. For a kids’ bunk that gets sand, spills and sunscreen every trip, a removable cover matters more than most spec-sheet features.
Foamma is made in the USA and the foam is CertiPUR-US certified with low VOC emissions, which matters in a small enclosed space where a chemical smell lingers for days. The mattress expands quickly out of the packaging, unlike the vacuum-packed models that need most of a weekend.
Why the 5-inch profile works on a bunk
Five inches is the sweet spot for most bunks. It is thick enough to hide the feel of plywood, thin enough that an adult can still sit up and get out without the rail feeling like a barrier, and firm enough that a lighter sleeper does not bottom out. For a child aged roughly five upward, that thickness also holds up as they grow.
The one cosmetic issue is the vacuum fold. Owners report a visible crease along the fold line that fades after about a month of use. Do not judge it in the first week. If the crease still shows after a month, that is a defect worth raising with the seller.
Where it falls short
This is a firm mattress and it will not suit someone who wants a plush or soft surface. Foam sleepers who sink into mattresses generally describe this as too hard, so if the bunk is for a guest used to a pillow top, pair it with a thin topper rather than expecting it to feel soft.
Foamma also warns that 6-inch and thicker versions sit high on a daybed or couch. At 5 inches you avoid most of that, but check how the bunk sits against the guard rail before you commit to the deeper variants.
3. FoamTouch 3-Inch Gel Bunk Mattress 36 x 72 – Best Budget Pick for Wide Bunks
FoamTouch 3″ Height x 36″ Width x 72″ Length Camper/RV bunk Mattress with Gel Memory Foam -No Cover
3 inch gel memory foam
36 x 72 in
1 inch gel over high density base
9.9 lb
Pros
- Firm high density base that holds shape
- Available across 12 RV sizes including 36 x 72
- Lightweight at under 10 pounds
- Made in USA
Cons
- Cover not included
- 3 inch profile is thin for side sleepers
- Needs up to 5 days laid flat to regain shape
FoamTouch earns its place on two things you cannot get elsewhere in this list: a 36 by 72 footprint for genuinely wide bunks, and a weight under 10 pounds. If your bunk is high up and the ladder is steep, that light a mattress is a genuine advantage on set-up day.
The build is straightforward. One inch of 3 lb density gel memory foam sits over a 1.8 lb density high-density base with a 44-pound compression rating, made in the USA. It carries a 30-day return window rather than a long sleep trial, so keep the packaging in case the size turns out wrong. The wider range of RV sizes it offers is the reason it appears here, because most competitors carry only four or five standard bunk dimensions and leave everything else to custom makers.
FoamTouch is also offered in 12 sizes from 24 by 72 up to 48 by 75, plus a 4-inch height variant. That range is the reason it appears here, because most competitors carry only four or five standard bunk sizes and leave everything else to custom makers.
Is a 3-inch profile enough?
Three inches is enough if the deck underneath is solid and your sleeper weighs under about 150 lbs. It is not enough if you can feel the plywood, and it is not enough for a side sleeper with a shoulder that needs pressure relief. If you already know the deck is bare slats, spend the extra inch and take the 4-inch variant instead.
Two more practical notes. The cover is not included, so budget for a zippered cover. And the foam needs up to five days laid flat to fully regain its shape, the longest decompression window of any pick in this roundup.
Where it falls short
FoamTouch has the lowest average rating of the ten at 4.1, with about 10 percent one-star reviews, and the complaints cluster on thickness rather than quality. Light sleepers and side sleepers describe it as too firm, which is a fair read on a 3-inch profile with a firm base.
Because there is no cover, the bare foam is also exposed to spills and dust. On a kids’ bunk that means it needs more upkeep than the models that ship with a washable cover, and you will want the cover on from day one.
4. Zenzy 4-Inch Memory Foam Bunk Mattress 28 x 75 – Best for a Washable Cover
Zenzy 4″ RV Twin Memory Foam Mattress 28″X75″ RV Bunk Bed/Camper/Trailer
4 inch dual layer memory foam
28 x 75 in
OEKO-TEX washable cover
CertiPUR-US foam
Pros
- Machine washable breathable removable cover
- Compact 28 x 75 footprint for small RVs
- Medium firm with strong motion isolation
- Owners say it hides the plywood bunk platform
Cons
- Cover runs slightly larger than the mattress below it
- One reviewer disputes the foam layer composition
- Heavier sleepers may sink deeper than expected
Zenzy exists for the 28 by 75 bunk, which is one of the most common narrow RV dimensions, and it arrives finished. The removable cover is machine washable and breathable, and the foam is CertiPUR-US certified with an OEKO-TEX certified cover. For a bunk that a child uses every single trip, that combination of washable cover and compact sizing is the practical win.
Owners credit it with eliminating the feel of the plywood platform, which is the specific complaint that drives most of these searches. The feel is medium firm with pressure relief and good motion isolation, useful on a shared bunk where one sleeper moves around.
It is vacuum packed and needs about 48 hours to expand, so plan a day of margin before the first night. Zenzy also makes the same mattress in RV Twin XL, Short Queen, Short King, Semi-Truck and Full sizes, which helps if you want to match the main bed later.
What to check when it arrives
Measure the width at three points on the bunk, not once. Bunk frames are often slightly tapered or pushed out of square, and the Zenzy cover is reported by some buyers as running a little larger than the mattress beneath it, which makes the bed harder to make. If the bunk is close to 28 inches, confirm clearance with a tape before the mattress is unboxed.
There is also a composition question worth knowing about. One reviewer reported that the variant they received was 1 inch of closed-cell memory foam over 3 inches of open-cell foam, not 4 inches of memory foam. That is a single report rather than a pattern, but it is a reminder to check the layer description on the listing you actually receive.
Who should skip it
Heavier sleepers should look elsewhere. Owners report sinking deeper than expected, and a 4-inch profile does not have the base depth to push back. The Zinus and INEHM 6-inch options are the better call for an adult on the bunk.
The rating here is 4.3 across 63 ratings, which is a thinner evidence base than most of this list. That is not a reason to avoid it, but it is a reason to buy from a seller who makes returns straightforward, because you have fewer owners to learn from before you commit.
5. Zinus 6-Inch Narrow Twin Green Tea Mattress – Most Proven Over 20,000 Ratings
Zinus 6 Inch Narrow Twin Green Tea Memory Foam Mattress, Medium Firm Feel
6 inch narrow twin
30 x 75 in
Green tea and ActivCharcoal foam
CertiPUR-US and OEKO-TEX
500 lb capacity
Pros
- Largest review base here at over 20k ratings
- 30 inch width matches standard RV bunks
- No chemical smell out of the package
- Vacuum packed and light to carry
- Rated to support up to 500 pounds
Cons
- Runs firmer than the medium firm label
- Some side sleepers find 6 inches less plush than expected
- Spot clean only and opened mattresses are hard to return
Nothing else in this roundup has an evidence base like this. More than 20,000 ratings, a rank of number two in Amazon’s Mattresses category, and years of owners reporting the same thing: excellent value for the comfort delivered and no off-gassing at all. For an RV bunk, avoiding a chemical smell in an enclosed cabin is worth a lot.
The narrow twin is 30 by 75 by 6 inches, which matches the most common standard RV bunk width. It is vacuum packed at 15.9 pounds, light to carry into a trailer, and rated to support up to 500 pounds. Many owners use it directly on a bunk bed frame with no platform and no complaints, which says more about the deck support than about the mattress.
The green tea and ActivCharcoal infused foam is the differentiator versus plain memory foam. Owners report no smell out of the package, and the cover has a zipper for removal. It is also one of the few 6-inch options in this exact 30-inch width.
How thick is right for a bunk
Six inches is the point where a bunk mattress stops feeling like a pad and starts feeling like a mattress. Above 6 inches you run into the guard rail on a top bunk, and below 5 inches you start feeling the deck. At 6 inches you get the cushioning without the clearance problem, which is why this one has stayed popular for years.
The catch is firmness. Despite the medium firm label, owners repeatedly describe it as much harder than expected, and a handful of side sleepers report back and shoulder pain. If the bunk is for a child or a back sleeper, that is fine. If it is for an adult side sleeper, pair it with a 2 or 3 inch topper.
What to know before it lands
Returns are the weak point. Care instructions are spot clean only, and an opened vacuum-packed mattress is very hard to send back. Treat the first night as a test: check the fit and the firmness before anyone settles in for a long trip.
Also keep it off the wet side of the bunk. Memory foam and standing condensation do not mix, and a bunk is the least ventilated sleep surface in the trailer. A breathable cover and a monthly air-out matter more here than on the main bed.
6. Modway Jenna 8-Inch Narrow Twin Hybrid – Best Coil Support in a Bunk
Modway Jenna 8” Innerspring and Memory Foam Narrow Twin Mattress With Individually Encased Coils White
8 inch narrow twin hybrid
30 x 75 in
7 encased pocket coils
Fire-resistant barrier
36 lb
Pros
- One of the few innerspring options for a narrow bunk
- Narrow twin 30 inch width fits standard RV bunks
- Expands in about 5 minutes
- Owners report back pain relief within a month
Cons
- Firmer than many buyers expect
- 300 lb weight limit is lower than foam options
- Tallest profile here at 8 inches
The Modway Jenna is the only genuine hybrid in this group and the only one with coils, and that changes the character of the bed completely. Seven individually encased pocket coils with foam layers give a firmer, more durable surface that springs back instead of conforming. For a bunk shared by adults, or anyone who dislikes the sinking feeling of memory foam, that difference is immediate.
It is also the tallest mattress here at 8 inches, rated to 300 pounds, with a fire-resistant polyester barrier meeting flammability standards and a 10-year warranty against manufacturer defects. Foam sleepers often ignore both of those; a bunk mattress used by kids in a motorhome is exactly the application where they matter.
Expansion is the practical surprise. Most vacuum-packed foam mattresses need two to three days. The Jenna expands fully in about five minutes for most buyers with no manufacturing odor, so you can install it during setup and use it that night. Owners replacing stacked foam toppers report back pain relief within a month.
Is 8 inches too tall for a bunk
On a lower bunk with a slide-out wall and plenty of clearance, 8 inches is fine and it is the most comfortable option in this roundup. On a top bunk with a guard rail, it raises the sleeping surface and can make climbing in and out awkward for a child. Measure the gap between the deck and the top of the rail before you order, and if the gap is under about 9 inches, choose a 6-inch model instead.
Weight is the other consideration. At 36 pounds this is by far the heaviest pick, and wrestling it up a ladder solo is a two-person job. It also eats more of your payload budget than any foam option here, which matters in a trailer already loaded close to its GVWR.
What to watch out for
Firmness is the recurring complaint. Several owners added a topper within days, and the mattress runs firmer than the medium label suggests. A 2-inch topper also solves the height problem partially, so the two adjustments work together.
The 30-inch narrow twin width is narrower than a modern standard twin, so check the bunk opening rather than assuming it fits. It suits narrow RV bunks and boat berths, not a full-size bunk frame.
7. Slumbrae 4-Inch Bamboo Cover Bunk Mattress 34 x 75 – Best for Wide RV Bunk Frames
Slumbrae Bunk RV Mattress 34×75, 4″ Memory Foam, CertiPUR-US
4 inch memory foam
34 x 75 in
OEKO-TEX bamboo rayon cover
CertiPUR-US foam
Washable
Pros
- 34 x 75 width matches many Jayco
- Keystone and Forest River bunks
- Bamboo rayon cover is cool and machine washable
- Light and flexible enough to carry solo
- Works as a mattress or a topper
Cons
- Some buyers report permanent indentations
- 4 inch profile adds height on a top bunk
- No corner straps so it can shift
- Smallest review base in the group
If your trailer takes a 34-inch bunk, this is the one on the list built for it. Owners with Jayco, Keystone and Forest River frames report the 34 by 75 footprint as the reason the purchase worked when narrower standard sizes did not fit. That sizing specificity is worth more than any feature we could add.
The cover is bamboo rayon under an OEKO-TEX certification, and it is machine washable. Owners consistently single out the cover as running cool, which matters because bunks sit low in the trailer with the least airflow of any sleeping surface. The foam itself is CertiPUR-US certified with no chemical odor out of the package.
It is also genuinely dual-sided in feel, with a medium and a medium-firm construction in one mattress, so you can flip it when one sleeper wants more give. Several owners use it either as a standalone mattress or as a topper over a thin factory pad, which makes it a flexible choice if your deck is already in decent shape.
Cooling and the bamboo cover
Bamboo rayon is one of the more breathable cover fabrics you will find on a bunk mattress, and in a hot bunk the difference between a polyester cover and a bamboo one is noticeable by the second night. Combine it with a breathable sheet rather than a tight fitted poly blend, and air the mattress out monthly.
It is vacuum packed and needs 48 to 72 hours to expand, so start it before the trip rather than the night of. If you are adding it over a factory pad rather than replacing, check the total height first, since two layers eat clearance fast.
What to keep in mind
There are no corner straps, and owners report the topper shifting out of position during the night. On a bunk where a sleeping child cannot easily retrieve a fallen pad, that is worth solving with a non-slip mat under the mattress rather than leaving it.
Some buyers also report permanent indentations that do not spring back, which points to the 4-inch profile bottoming out under a heavier sleeper over time. At 51 ratings this is the smallest evidence base in the roundup, so read the recent reviews for your weight range before buying.
8. INEHM 6-Inch Gel RV Bunk Mattress 28 x 72 – Best for Moisture and Weight
6 Inch RV Bunk Mattress, 28″ x 72″ RV Mattress Gel Memory Foam – High Density Medium Certified Camper Bunk Mattress with Breathable Soft & Washable Removable Cover for Travel Trailer/Cargo Van/RVs
6 inch gel memory foam
28 x 72 in
Moisture resistant high density foam
Washable zip cover
16.1 lb
Pros
- 6 inch high density profile gives more support than 3-4 inch models
- Soft quilted top over a supportive core
- Removable machine washable zip cover
- 12-month trial and 10-year limited warranty
Cons
- Some buyers find it firmer and thinner than photos suggest
- Frame bars can be felt on bare slatted decks
- Most reviews cover larger sizes not this 28x72 model
Bunks are the lowest and least ventilated sleep surface in an RV, so moisture is the failure mode that matters most here. The INEHM uses high-density moisture-resistant gel memory foam, and its washable zip cover can be thrown in the wash after a damp campground week. That pairing is why it made the list.
The build is 6 inches thick in a 28 by 72 footprint at 16.1 pounds, with a soft quilted top over a supportive core. Owners describe it as firm but not rock hard, and it sits well above the 3 and 4 inch models for support. It comes with a 12-month test period and a 10-year limited service warranty, which is stronger coverage than most others in this group.
It ranks in the top six RV Bed Mattresses on Amazon and expands quickly with no odor. The zip knit and thickened canvas cover is both breathable and machine washable, and the foam is CertiPUR-US certified in a layered construction.
Check your deck before a thicker mattress
This is where the 6-inch profile pays off or does not. On a plywood or slatted deck you will feel the frame bars through the foam, and owners say so directly. If your bunk is bare slats, add a bunkie board or a thin plywood sheet before the mattress goes in. That fix costs a fraction of the mattress and removes the most common complaint we found against this model.
The same caution applies to bunk height. At 6 inches the sleeping surface rises, so check the guard rail gap and confirm an adult can sit up comfortably before you commit.
Where it falls short
Some buyers find it firmer and thinner than it appears in listing photos, which is the usual complaint on any gel mattress sold on dimensions alone. It is firm rather than plush, and the quilting is thin, so a light sleeper may want a topper.
One practical caveat: most of the reviews on this listing cover the brand’s larger sizes rather than the 28 by 72 bunk model specifically. Judge it on dimensions and construction, and expect fewer owner photos of this exact size.
9. Milliard 5-Inch Memory Foam Twin Mattress – Best for Wider Bunks and Daybeds
Milliard 5 in. Memory Foam Mattress Twin – for Bunk Bed, Daybed, Trundle or Folding Bed Replacement (1 Pack)
5 inch memory foam
38 x 74 in
1 inch memory foam over 4 inch base
Washable cover
15 lb
Pros
- Plush breathable surface built for bunk beds
- trundles and daybeds
- Removable machine washable cover
- Two layer design balances softness with durability
- Sold as a single pack so a second bunk can match
- Light at 15 pounds
Cons
- 38 inch width is wider than most RV bunks
- Only a 5 inch profile
Milliard is the one to look at if your bunk is a converted sofa, a daybed or a truck bed rather than a factory travel trailer bunk. It is a standard twin at 38 by 74 by 5 inches, and it is explicitly designed for bunk beds, trundle beds, daybeds, folding beds and rollaways. That is a different job from a narrow RV bunk.
The construction is sensible: 1 inch of memory foam over 4 inches of support foam, which is the ratio that keeps a plush top from bottoming out. It rates 4.5 across nearly 1,200 reviews, and the removable cover is machine washable. At 15 pounds it is easy to move between beds, and it is sold as a single pack so you can match a second bunk later.
The trade-off is size, and it is a hard one. Thirty-eight inches wide will not fit most narrow RV bunk frames, so if you buy this for a trailer, measure the bunk opening first. If it fits, it is one of the few mattresses here that is plush enough for a light sleeper rather than merely durable.
When this is the right choice
Choose Milliard when the sleeping surface is a converted sofa, a dinette converted at night, a truck bed with a camper shell, or a pop-up sleeping deck that is not a fixed narrow bunk. In those applications the standard twin footprint is a feature, because you are not fighting a 28 or 30 inch opening.
At 5 inches it also works well on a daybed where height matters. Owners using it on trundles and rollaways report good results, and the plush surface is easier for a child to get comfortable on than a firm high-density slab.
What to watch out for
The profile is 5 inches, which is thinner than the 6 and 8 inch options here. On a hard deck with a heavy sleeper that will feel thin over time. It suits lighter sleepers and children better than it suits a 200-plus pound adult.
Also check the length. At 74 inches it is half an inch shorter than a standard 75-inch bunk, which is harmless with a fitted sheet but means the foot end may sit slightly proud of the deck. Confirm 74 inches works with your sheet set before ordering.
10. MLILY EGO 6-Inch Gel Twin Mattress – Coolest Surface for Hot Bunks
MLILY EGO 6 Inch Twin Mattress – Green Tea Memory Foam, Cooling Gel, Fiberglass-Free, CertiPUR-US Certified, for Kids, Bunk Beds, Trundle & Daybeds
6 inch Twin
38 x 75 in
Cooling gel and green tea foam
Fiberglass-free
CertiPUR-US and OEKO-TEX
Pros
- Highest average rating among the all foam options here
- 78 percent five star reviews
- Cooling gel and green tea infusion stays cool overnight
- Fiberglass-free construction
- Expands in about 30 minutes
- Medium firm feel with good motion isolation
Cons
- 38 inch width is too wide for narrow RV bunks
- Softer than the medium firm label suggests
- No trial period and opened mattresses cannot be returned
MLILY EGO has the highest average rating among the all-foam mattresses here at 4.6, with 78 percent five-star reviews. It is also the one owners most often describe as staying cool through the night, which is the complaint that dominates every other review in this niche. The cooling gel and green tea infusion is doing real work in a hot bunk.
It is a 6 inch Twin at 38 by 75, so it belongs on a standard twin bunk, daybed, trundle or slatted platform rather than a narrow RV bunk. It is fiberglass-free, which matters for families avoiding flame-retardant fibers around children, and it carries both CertiPUR-US and OEKO-TEX Standard 100 certification with a 10-year limited warranty.
Two practical wins stand out. It expands in about 30 minutes and measures its full 6 inches almost immediately, so there is no weekend decompression window. And the cover is 92 percent cotton and 8 percent polyester, which is a breathable blend that adds to the cooling effect owners report.
What makes it run cool
Three things stack up here. The gel infusion in the memory foam draws heat away from the contact points, the high-density base keeps the sleeper on top of the foam rather than sinking into it, and the cotton-blend cover lets moisture move instead of trapping it. In an unventilated bottom bunk in summer, that combination is the difference between sleeping and enduring.
The trade is sink. Owners describe a medium firm feel that is softer than the label suggests, so heavier side sleepers may sink further than they want. A firmer base layer or a bunkie board keeps the hips up if that becomes an issue.
What to know before buying
The 38 inch width is the deciding factor. It fits a standard twin bunk or daybed but not the narrow openings in most travel trailers. Measure first. If your bunk takes a standard twin, this is the strongest all-foam option in the roundup on both rating and cooling.
Returns are also limited. There is no trial period and opened mattresses cannot be returned, so order it only when you are confident in the size and the feel. At 6 inches on a 6 inch frame the bed sits high, which can be awkward for a small child to climb into.
RV Bunk Mattress Buying Guide: Size, Type and Thickness
An RV bunk mattress is a short, narrow, low-profile mattress made for the stacked bunks built into travel trailers, fifth wheels, Class C motorhomes and pop-up campers. Most measure between 28 and 42 inches wide by 72 to 80 inches long, and typically run 4 to 8 inches thick. The sizes are non-standard because the frames are built into the wall, cabinetry and slide-out of the trailer.
How to measure your RV bunk
Measure length along the deck from wall to rail, then measure width at three points: the head end, the middle and the foot end. If those three numbers differ, use the narrowest one. Next, measure the deck thickness and the total height from deck to the top of the guard rail, because that number sets your ceiling on mattress thickness. Finally, measure any cut corner in two directions, from each edge to the notch.
Do that last step carefully. Cut-corner bunks are common on curved frames, and they are the reason a standard rectangle will not sit flat. Measure the notch depth and width, sketch it, and compare it against the mattress outline. If the corner is awkward, a bare foam mattress like the FoamRush can be trimmed, or you can look for a manufacturer that builds custom sizes.
How thick can an RV bunk mattress be?
Most bunks accept 5 to 6 inches comfortably, and 4 inches is the practical floor before you start feeling the deck. Going above 6 inches on a top bunk is where safety matters: once the mattress rises, the gap between the sleeping surface and the top of the guard rail shrinks, and a child can roll over that reduced gap. A 10-inch mattress on a bunk bed is not a comfort upgrade, it is a fall risk.
Check the rail clearance before ordering anything above 6 inches. If the deck sits low and the rail is fixed, stay at 6 or below. On a lower bunk with a slide-out wall, 8 inches is workable and the Modway Jenna is the pick if you want the extra depth.
Which mattress type works best in a bunk
High-density firm foam is the most common choice for a reason. It is light, it does not trap heat the way memory foam does, and it holds its shape in a trailer that flexes over bumps. Gel memory foam adds pressure relief for side sleepers at a similar weight. Hybrid innerspring gives the best springback and the most even support but is the heaviest and tallest option, which is a real constraint on a top bunk.
On materials safety, CertiPUR-US certification is the standard worth checking. It certifies that the foam is made without ozone depleters, heavy metals, formaldehyde and certain flame retardants, and it limits volatile organic compound emissions. In a small enclosed trailer with no ventilation, that is a meaningful difference, and most owners of these foams report little or no off-gassing. Look for OEKO-TEX on the cover as a second check.
Cooling, moisture and the deck underneath
Bunks are the lowest and least ventilated sleeping surface in an RV, so condensation under a bunk mattress is a real and common problem. Air the mattress out monthly, keep a breathable sheet rather than a plastic-fibre blend, and avoid storing bedding against the underside where moisture collects. A mattress that runs cool to begin with, like the MLILY EGO or the Slumbrae bamboo cover, reduces the problem at the source.
Before buying a thicker mattress, check the deck. If you can feel slats or frame bars through the current pad, add a bunkie board or a thin plywood sheet first. It is a small fix that removes the most common complaint against the thicker models, including feeling frame bars through 6 inches of foam. If you are planning the rest of the build, our guide to RV cooking essentials for small kitchens covers the other upgrades worth doing at once.
Frequently Asked Questions
What size are RV bunk mattresses?
RV bunk mattresses usually measure 28 to 42 inches wide by 72 to 80 inches long. The most common narrow sizes are 28 x 75, 30 x 75, 32 x 75 and 34 x 75, while 28 x 72, 36 x 72 and 38 x 74 appear in pop-up campers, daybed conversions and wider bunks. Always measure width at three points because frames are often slightly tapered.
Can I put a 10 inch mattress on a bunk bed?
No. On a top bunk a 10 inch mattress raises the sleeping surface until the gap between the sleeper and the top of the guard rail becomes a fall hazard. Most bunks handle 5 to 6 inches well, 4 inches is the practical floor, and 8 inches works only on a lower bunk with a slide-out wall and full rail clearance.
What type of mattress is best for an RV bunk?
High-density firm foam is the most reliable choice because it is light, durable and does not trap heat. Gel memory foam adds pressure relief for side sleepers, and a hybrid innerspring gives the best springback but is the heaviest and tallest option. All three work in a bunk if the size and the rail clearance are right.
How do I measure an RV bunk with a cut corner?
Measure the deck length, then width at the head, middle and foot, and use the narrowest figure. For the notch, measure depth from each wall to the corner point and the length of the cut along both edges, then sketch the shape. Bare foam mattresses can be trimmed to match, or you can order a custom size from an RV mattress manufacturer.
Do RV bunk mattresses need to be fire resistant?
Foam mattresses are not fireproof and many are treated to slow ignition. A hybrid with a fire-resistant polyester barrier, such as the Modway Jenna, adds a meaningful layer of protection in a motorhome where wiring and fabrics are close at hand. For foam models, CertiPUR-US certification confirms the foam is made without heavy metals, formaldehyde and certain flame retardants.
Bottom Line: Which RV Bunk Mattress Should You Buy?
Start by measuring, because a half-inch error ends the purchase. For a standard narrow bunk, the FoamRush 4-Inch Gel Bunk Mattress is our pick because the bare foam can be trimmed to any shape and it holds up over years of nightly use. If your back hurts on the factory pad, go thicker with the Foamma 5-Inch and add a bunkie board underneath. For a bunk that takes a full standard twin, the MLILY EGO is the coolest all-foam option here, and the Milliard 5-Inch covers converted sofas and daybeds.
Whatever you choose for your bunks in 2026, keep it at 6 inches or below on a top bunk, check the guard rail clearance before the mattress is unboxed, and give any vacuum-packed foam a full couple of days laid flat before you judge it.