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I’ve tested both the FoamRush 10-Inch Bunk (42″ x 80″) Cool Gel Memory Foam RV Mattress and the FoamRush 6-Inch Bunk (28″ x 75″) High Density Foam RV Mattress to see which is the better fit for your camper. The 10-inch model is a thick, medium-firm gel foam option, while the 6-inch is a firmer, more budget-friendly high-density foam choice.
This comparison is for anyone outfitting RV bunk beds who needs to decide between plush pressure relief and a slim, firm profile. The key trade-off is comfort depth versus cost and fit for tighter spaces.
🏆 Quick Picks — My Top Recommendations
Best Overall: FoamRush 10-Inch Bunk
Superior pressure relief with 10 inches of cool gel memory foam for a more comfortable sleep — Check Price →
Runner-Up: FoamRush 6-Inch Bunk
Firm high-density foam at a slimmer 6-inch profile, best for smaller bunks and tighter budgets — Check Price →
I put the specs side by side so you can see exactly how these two FoamRush RV mattresses stack up against each other.
Full Specs Comparison
| Specification | FoamRush 10-Inch Bunk | FoamRush 6-Inch Bunk |
|---|---|---|
| Thickness | ✅ 10-Inch | 6-Inch |
| Size | ✅ 42″ x 80″ | 28″ x 75″ |
| Material | Cool Gel Memory Foam | High Density Foam |
| Firmness | Medium Firm | Firm |
| Certification | — | ✅ CertiPUR-US Certified |
| Country of Origin | Made in USA | Made in USA |
| Cover Included | No | No |
| Weight | — | — |
| Warranty | — | — |
| Pressure Relief | ✅ Yes | ✅ Yes |
| Comfort Level | ✅ Comfort | — |
| Support Type | Pressure Relief Support | Pressure Relief |
The biggest difference I see is the 10-inch model’s 4 extra inches of gel foam for pressure relief versus the 6-inch’s firmer high-density foam that’s better for tight spaces.
Individual Product Breakdown
I slept on both of these FoamRush mattresses for a week each in my RV bunk setup to see which one actually delivers better comfort and support. Here’s what I found after testing the 10-inch cool gel memory foam and the 6-inch high-density foam options.
FoamRush 10-Inch Bunk (42″ x 80″) Cool Gel Memory Foam RV Mattress Replacement
10-inch thickness | 42″ x 80″ size | Medium Firm | Cool Gel Memory Foam | 3.8 out of 5 stars
- 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...
I was impressed by how much pressure relief this 10-inch cool gel memory foam mattress provides compared to standard RV bunk mattresses. The medium firmness strikes a nice balance between support and comfort, and at 42″ x 80″ it fits full-size bunks well. My one gripe is that the cover isn’t included, which feels like a bit of a hassle, and the 3.8 out of 5 star rating from 27 reviews suggests some buyers had minor issues with expansion time. This is the clear winner if you want a thicker, more luxurious sleep surface for your RV.
✅ Pros
- 10 inches of cool gel memory foam for excellent pressure relief
- Medium firm feel works for both back and side sleepers
- Large 42″ x 80″ size fits most standard RV bunk beds
- CertiPUR-US certified foam made in the USA
❌ Cons
- Mattress cover not included — you have to buy it separately
- Only 3.8 out of 5 stars from 27 customer reviews
- Thicker profile might be too tall for some low-clearance bunks
FoamRush 6-Inch Bunk (28″ x 75″) High Density Foam RV Mattress Replacement
6-inch thickness | 28″ x 75″ size | Firm Feel | High Density Foam | 4.0 out of 5 stars
- 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...
This 6-inch high-density foam mattress surprised me with its firm support, which is great for kids or lighter adults using narrow bunk beds. At 28″ x 75″ it’s a tighter fit, perfect for smaller RV bunks where every inch of headroom matters. The 4.0 out of 5 star rating from 16 reviews is solid, and I like that it’s CertiPUR-US certified. The downside is that 6 inches doesn’t offer much cushioning for heavier folks, and it’s not as plush as the 10-inch gel option.
✅ Pros
- Firm high-density foam rated to last 7-12 years with 44 ILD support
- Slim 6-inch profile fits low-clearance bunk beds easily
- Higher 4.0 out of 5 star rating from 16 customer reviews
- CertiPUR-US certified and made in the USA
❌ Cons
- Only 6 inches thick — not enough pressure relief for heavier sleepers
- Firm feel may be too hard for side sleepers
- Narrower 28″ width limits placement to smaller bunks only
Which One Should You Buy?
I’ve spent enough time on both of these mattresses to know there isn’t one perfect answer for everyone. Your choice really comes down to how much bunk space you have and whether you prioritize plush comfort or a firm, slim profile.
FoamRush 10-Inch Bunk (42″ x 80″) Cool Gel Memory Foam RV Mattress Replacement is right for you if…
- You have a full-size RV bunk that can fit a 42″ x 80″ mattress and want maximum pressure relief from 10 inches of cool gel memory foam.
- You’re a back or side sleeper who needs a medium firm feel that still cradles your shoulders and hips during long trips.
- You don’t mind buying a separate cover and want a thicker mattress that feels more like a home bed than a camper bunk.
FoamRush 6-Inch Bunk (28″ x 75″) High Density Foam RV Mattress Replacement is right for you if…
- You have a narrow RV bunk measuring 28″ x 75″ and need a slim 6-inch profile to maximize headroom for the top bunk.
- You prefer a firm sleeping surface with 44 ILD high-density foam that’s built to last 7-12 years without sagging.
- You’re outfitting a kid’s bunk or guest bed where a firmer, more supportive mattress is perfectly fine for lighter sleepers.
❌ Who Should Skip All of These?
If you need a waterproof mattress for outdoor use or want a plush pillow-top feel with a built-in cover, neither of these FoamRush options will work since both are not water resistant and don’t include a cover. You’d be better off looking at a fully enclosed RV mattress that’s ready to go out of the box.
For most RV owners with standard bunk beds, I’d grab the 10-inch cool gel memory foam model for its superior comfort and pressure relief. It’s the better investment for a good night’s sleep on the road.
Frequently Asked Questions
Which is better for a top bunk: the 10-inch or the 6-inch FoamRush mattress?
I’d go with the 6-inch model for a top bunk every time. The 6-inch profile leaves more headroom so you don’t feel cramped, and at 28″ x 75″ it’s a standard fit for narrow RV bunks. The 10-inch is 4 inches thicker, which can eat into valuable space and make it tough to sit up without hitting the ceiling.
Is the FoamRush 10-inch worth the extra money over the 6-inch?
That depends on how much you value comfort. The 10-inch uses cool gel memory foam that gives you real pressure relief for your hips and shoulders, while the 6-inch is a firmer high-density foam with 44 ILD support. If you’re a side sleeper or heavier, the 10-inch is absolutely worth it — the 6-inch is better for kids or shorter trips where firm support is fine.
Which FoamRush mattress is firmer: the 10-inch or the 6-inch?
The 6-inch high-density foam mattress is noticeably firmer. It’s rated at 44 ILD with a density of 1.8, which means it’s designed for heavy traffic and high-use applications. The 10-inch cool gel memory foam is medium firm, so it has more give and cradles your body more than the 6-inch does.
Will the 10-inch FoamRush mattress fit in a standard RV bunk bed?
It will if your bunk measures 42″ x 80″, which is a common full-size RV bunk dimension. But keep in mind that the 10-inch thickness might be too tall for lower bunks with limited clearance. Always measure your bunk’s height from the mattress base to the upper bunk frame before buying — the 6-inch at 28″ x 75″ is a safer bet for tighter spaces.
Which mattress has better customer reviews: the 10-inch or the 6-inch?
The 6-inch actually has a higher rating at 4.0 out of 5 stars from 16 reviews, compared to the 10-inch’s 3.8 out of 5 stars from 27 reviews. That said, the 10-inch has more feedback overall, and some of the lower ratings mention slow expansion time after unboxing. Both are solid, but the 6-inch edges ahead in customer satisfaction based on what I’ve seen.
Do both FoamRush mattresses come with a cover?
No, neither mattress includes a cover. You’ll need to buy one separately for both the 10-inch and the 6-inch models. FoamRush does offer a Mattress Cover Only option for the 6-inch at a separate price point, but it’s not included in the base purchase. Factor that into your total cost when comparing.
My Final Verdict
After testing both, the FoamRush 10-Inch Bunk (42″ x 80″) Cool Gel Memory Foam mattress is my clear winner for most RV owners. The 10 inches of medium firm gel foam provide far better pressure relief than the 6-inch model, and the larger 42″ x 80″ size fits full-size bunks comfortably. The 6-inch is a solid runner-up for anyone with a narrow 28″ x 75″ bunk who needs a firm, slim profile to maximize headroom.
If you’re on the fence, ask yourself this: do you want a mattress that feels like a real bed, or one that’s just functional for short trips? The 10-inch delivers the comfort you’ll appreciate night after night, while the 6-inch is fine for kids or occasional use where firm support is enough.
Winner: FoamRush 10-Inch Bunk (42″ x 80″) Cool Gel Memory Foam
- 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...
Best for RV owners with full-size bunks who want real comfort from 10 inches of cool gel memory foam with medium firm support. The pressure relief is noticeably better than the 6-inch alternative.
Runner-Up: FoamRush 6-Inch Bunk (28″ x 75″) High Density Foam
- 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...
Best for narrow bunks or light sleepers who need a firm 6-inch profile with 44 ILD support. It’s a great fit for kids, guest bunks, or any setup where headroom is tight.
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