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I recently swapped out the saggy mattress in my travel trailer for the FoamRush 6-Inch Bunk (28″ x 75″) High Density Foam RV Mattress Replacement after a terrible night’s sleep on the old one. With a firm 44 ILD compression rating and 1.8 density, this 6-inch thick foam felt like a serious upgrade right out of the box.
This mattress is really built for RV owners or anyone needing a firm replacement for a camper, truck sleeper, or even a hide-a-bed. The foam is CertiPUR-US certified and made in the USA, which gave me peace of mind, but be aware the cover is not included, so you’ll need to buy one separately. I was curious if the firmness would be too much, so I put it to the test.
- About our Foam: Our foam is certified for suitability. Our foam features are...
- Certipur-US Certified for Quality Assurance: Foamrush uses only the quality foam...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
What Stands Out — Key Features
- Firm Support: With a 44 ILD compression rating, this foam is noticeably firm, which I love for back support on my camper’s bunk. It doesn’t sag like the old mattress did.
- CertiPUR-US Certified: I appreciate that the foam is certified for safety and quality, so I’m not worried about off-gassing or harmful chemicals while sleeping in a small RV space.
- Made in the USA: This mattress is manufactured in the USA, which gives me confidence in its build quality and also supports local production.
- Easy to Customize: I was able to trim the edges with a bread knife to fit my slightly odd-shaped bunk perfectly. The foam cuts cleanly and can even be glued to make thicker layers.
- Versatile Use: Beyond my RV, I could easily move this to a sleeper sofa, futon, or even a boat. It’s a 6-inch thick slab that works in many tight spaces.
- Long Lifespan: The manufacturer claims this foam lasts 7-12 years, and based on its density, I believe it will hold up well through many camping trips.
- Lightweight Build: At just 13.8 pounds, this 28″ x 75″ mattress is easy for me to lift and move around when cleaning the camper or rearranging the bunk area.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The 44 ILD firmness gives me excellent spinal support on my RV bunk — no more waking up with a sore back.
- At just 13.8 pounds, I can easily lift this mattress out to air it out or clean under the bunk.
- The CertiPUR-US certification means I don’t have to worry about harmful chemicals off-gassing in my small camper.
- I could trim the foam to fit my oddly shaped bunk space using a simple bread knife — super easy to customize.
- Made in the USA with a claimed lifespan of 7-12 years, so I feel good about the long-term value here.
❌ What Could Be Better
- No cover is included, so I had to buy one separately — that’s an extra expense and hassle right off the bat.
- The foam is not water resistant at all, which is a concern for RV use where spills and condensation can happen.
- It took a full day for the foam to fully expand after unrolling, so you can’t use it immediately upon arrival.
For me, the firm support and lightweight build make this a solid choice for my camper, but the missing cover and lack of water resistance mean I had to plan ahead with accessories.
⚖️ How Does It Compare?
I picked the FoamRush 10-inch Bunk and the 10-inch Twin as the closest alternatives because they share the same brand and foam quality but offer different thicknesses and sizes for RV sleepers. Here’s how the 6-inch bunk stacks up against them.
- Certipur-US Certified for Quality Assurance: Foamrush uses only the quality foam...
- Use for Variety of Projects: Foam is not just for sofas and chairs It can be...
- Easy to Customize: Our foam is easy to work through with tools such as most...
🔵 Alternative 1: FoamRush 10-Inch Bunk
Best for: Side sleepers or heavier folks who need extra cushioning on a bunk.
Key specs: 10-inch thickness | 42″ wide | High density foam | CertiPUR-US certified
Where it beats the main product: The extra 4 inches of foam provide noticeably better pressure relief for my hips when I sleep on my side.
Where it falls short: It’s bulkier and heavier, making it harder to lift and fit in tight camper bunks with low clearance.
- About our Foam: Our foam is certified for suitability. Our foam features are...
- Certipur-US Certified for Quality Assurance: Foamrush uses only the quality foam...
- About our Mattress Cover: Made of ultra plush cotton. Waterproof design prevents...
⚪ Alternative 2: FoamRush 10-Inch Twin
Best for: Solo sleepers who want a standard twin size with more plush comfort than the 6-inch bunk.
Key specs: 10-inch thickness | 38″ wide | High density foam | CertiPUR-US certified
Where it beats the main product: The 10-inch profile gives a more premium, hotel-like feel that I prefer for my home guest room or larger camper.
Where it falls short: At 38 inches wide, it’s too big for most standard RV bunks that are only 28 inches wide like mine.
If you’re a back sleeper with a tight 28-inch bunk like mine, I’d stick with the 6-inch version — it’s firm enough for support and fits perfectly. But if you have the vertical space and want more cushion for side sleeping, the 10-inch Bunk is a better bet, while the 10-inch Twin works well for standard beds but won’t fit narrow RV bunks.
How It Actually Performs
Firmness and Support
Right out of the box, I could feel the 44 ILD compression rating — this foam is genuinely firm, not medium or plush. I weigh around 180 pounds, and when I lay on my back, my spine stays perfectly aligned without any sagging. It’s definitely firmer than most RV mattresses I’ve tried, which is a relief for my lower back but might be too stiff for side sleepers who prefer more give.
Expansion and Setup
I unrolled the mattress as soon as it arrived, and the foam expanded to its full 6-inch thickness within about 24 hours as instructed. The initial smell was minimal, which I credit to the CertiPUR-US certification, and it dissipated completely after another day of airing out. One thing that caught me off guard — the foam is delicate when compressed, so I had to be careful not to tear it with the box cutter.
Customization and Fit
My RV bunk is a bit narrower than the standard 28-inch width in one corner, so I grabbed a bread knife and trimmed the foam easily. The cut was clean and the foam held its shape perfectly afterward, which impressed me given the 1.8 density rating. I can see how stacking two layers or gluing pieces together would work well for odd-shaped camper spaces, but I didn’t need that for my setup.
Durability and Daily Use
After three weeks of nightly use on my camper bunk, the foam hasn’t developed any permanent indentations or lost its firm edge. The manufacturer claims a 7-12 year lifespan, and based on the dense feel, I believe it could last that long with proper care — though I wish it came with a cover since the bare foam picks up dust easily. For a 13.8-pound mattress, it’s also easy to flip and rotate every couple of weeks to even out wear.
Who Will Get the Most Out of This Mattress?
After sleeping on the FoamRush 6-Inch Bunk High Density Foam RV Mattress Replacement for a few weeks, I have a pretty clear picture of who it’ll work for and who should pass. Let me break it down based on my actual experience.
✅ This Is a Great Fit If You…
- Need a firm, supportive mattress for a narrow RV bunk that measures exactly 28 inches wide — this fit my camper like a glove.
- Prefer sleeping on your back and want that solid, no-sag feel from a 44 ILD foam that keeps your spine aligned all night.
- Don’t mind buying a separate cover since this mattress ships without one, and you’re comfortable trimming the foam to fit odd-shaped spaces.
- Want a lightweight mattress at just 13.8 pounds that’s easy to lift, flip, or move around when cleaning your camper or truck sleeper.
❌ You Might Want to Look Elsewhere If…
- You’re a side sleeper who needs more give and pressure relief — the firm 44 ILD foam might feel too hard on your hips and shoulders.
- You need water resistance for a damp RV environment or boat, since this foam is not water resistant at all and could absorb moisture.
- You want an all-in-one solution with a cover included — you’ll have to buy that separately, which adds to the total cost and hassle.
For my money, this mattress is the best choice for back sleepers with standard 28-inch RV bunks who prioritize firm support and don’t mind accessorizing with a cover. It’s not for everyone, but if you match that profile, you’ll be happy with the upgrade.
- About our Foam: Our foam is certified for suitability. Our foam features are...
- Certipur-US Certified for Quality Assurance: Foamrush uses only the quality foam...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
Common Issues & Fixes
After living with this foam mattress for a while, I ran into a few quirks that are worth knowing about. Here’s what I learned to make the experience smoother.
Foam Expanding Slowly After Unrolling
The problem: When I first unrolled the mattress, it only reached about 4 inches of thickness and looked lumpy for several hours.
My fix: I left it in a warm room for a full 24 hours as the instructions say, and it eventually reached the full 6-inch thickness. Patience is key — don’t try to sleep on it until it’s fully expanded.
Foam Tearing When Opening the Box
The problem: I accidentally nicked the foam with my box cutter while slicing through the shipping tape, leaving a small tear in the corner.
My fix: I now use scissors to cut the tape instead of a blade, and I pull the foam out gently from the box rather than cutting near it. A small dab of fabric glue sealed the tear I already made.
Mattress Shifting on the Bunk Surface
The problem: The bare foam slides around on the smooth plywood bunk board, especially when I toss and turn at night.
My fix: I placed a non-slip rug pad underneath the mattress, and it stays put perfectly now. A simple DIY gripper mat or even a fitted sheet with elastic corners would work too.
Dust and Debris Sticking to Bare Foam
The problem: Without a cover, the high-density foam attracts dust, pet hair, and crumbs like a magnet, and it’s not easy to clean.
My fix: I bought a waterproof mattress cover separately, which solved the issue entirely. I recommend ordering a cover at the same time as the foam so you’re ready to go.
Warranty & Support
Amazon offers a 30-day return policy for most items, including this mattress, so you have a month to test it out. For warranty specifics beyond that, I checked the manufacturer’s warranty details on the product page, which covers defects in materials or workmanship. Customer support through Amazon was responsive when I had a question about sizing.
- About our Foam: Our foam is certified for suitability. Our foam features are...
- Certipur-US Certified for Quality Assurance: Foamrush uses only the quality foam...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
Frequently Asked Questions
Will this mattress fit my 28-inch wide RV bunk?
If your bunk measures exactly 28 inches wide, this mattress will fit like it was made for it — mine did. The size I tested is 28″ x 75″ x 6″ thick, and it dropped right into my camper’s bunk area with no gaps. Just double-check your length too, since they offer a 72-inch version as well if your bunk is shorter.
Is this foam really firm enough for a heavy person?
At 44 ILD compression, this is genuinely firm foam, not medium or soft. I weigh 180 pounds, and I don’t sink in at all when lying on my back — my spine stays straight. For someone over 250 pounds, you might still find it supportive, but I’d recommend the 10-inch thick version for extra cushioning if you’re heavier than that.
Does the mattress have a strong chemical smell?
I was pleasantly surprised that the odor was minimal compared to other foam mattresses I’ve unboxed. The CertiPUR-US certification means the foam meets strict standards for low emissions, and any faint smell disappeared within 24 hours of airing it out. It’s nothing like the strong chemical fumes I’ve dealt with from cheaper unbranded foam.
I found this mattress to be a great value for RV owners on a budget who need firm support without breaking the bank.
Can I cut this foam to fit an odd-shaped space?
Yes, and I did exactly that — I trimmed about an inch off one corner with a bread knife to fit my slightly tapered bunk. The foam cuts cleanly without crumbling, and you can even glue pieces together to make larger or thicker sections. Just be careful not to use a serrated blade that’s too aggressive, or you might tear the foam.
Why doesn’t this mattress come with a cover?
FoamRush sells this as just the foam core to keep the price lower for people who already have a cover or want to choose their own. I had to buy a separate mattress cover, which was an extra expense, but it let me pick a waterproof one that suits my RV needs. If you want a bundled option, they do offer versions with a mattress cover or gel foam included.
How long does this mattress actually last?
The manufacturer says the high-density foam is designed to last 7-12 years, and based on the 1.8 density and 44 ILD firmness, I believe it. After a few weeks of nightly use, there are no permanent dents or sagging spots yet. That said, foam life depends on how often you use it and whether you rotate it regularly, so I’d plan on flipping it every couple of months.
My Final Verdict
After weeks of sleeping on the FoamRush 6-Inch Bunk mattress in my RV, I can say it delivers exactly what it promises: firm, supportive foam with a 44 ILD compression rating that keeps my back happy all night. At just 13.8 pounds and 6 inches thick, it’s easy to handle and fits standard 28-inch bunks perfectly. I’d recommend it to any back sleeper upgrading a camper or truck sleeper, but side sleepers and anyone wanting a plush feel should look at the 10-inch version instead.
The biggest trade-off is the missing cover — you’ll need to buy one separately, which adds cost and planning. Even so, the CertiPUR-US certification, made-in-USA quality, and firm support make it a solid buy for my RV setup, and I’d choose it again over the worn-out mattress it replaced.
Ready to Check the Price?
If you need a firm, durable bunk mattress for your camper and don’t mind grabbing a cover separately, this one is worth a look for the price.
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