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I’ve been testing two popular RV sleeping upgrades: the Ferlizer 4″ Memory Foam Mattress Topper (53″x75″) and the CRAURU 72″ x 28″ x 3″ RV Bunk Mattress Replacement. Both aim to fix that awful factory mattress, but they go about it very differently — one is a thick dual-layer topper, the other a dedicated bunk replacement.
If you’re a weekend camper or full-time RVer tired of waking up sore, this comparison will help you pick the right one. I’ll break down real specs, comfort levels, and who each mattress is actually built for.
🏆 Quick Picks — My Top Recommendations
Best Overall: Ferlizer 4″ RV Full Topper
Dual-layer design with two firmness options and a CertiPUR-US certified memory foam core — Check Price →
Runner-Up: CRAURU 72″x28″x3″ Bunk Mattress
Medium-firm high-density foam at only 8.4 lbs, perfect for tight bunk spaces — Check Price →
I’ve lined up the specs that actually matter for an RV mattress so you can see exactly how these two compare at a glance.
Full Specs Comparison
| Specification | Ferlizer 4″ [RV Full] Mem | CRAURU 72″ x 28″ x 3″ RV |
|---|---|---|
| Dimensions | 53″x75″x4″ | ✅ 72″x28″x3″ |
| Weight | — | ✅ 8.4 lbs |
| Firmness | Medium/Medium Firm | Medium Firm |
| Cover Material | ✅ 60% Polyester, 40% Rayon | Polyester |
| Fill Material | Memory Foam | High Density Foam |
| Special Feature | Breathable, Washable | Pressure Relief |
| Number of Layers | ✅ 2 | 1 |
| Certification | ✅ CertiPUR-US | — |
| Color | ✅ 4 in | Blue Egg Foam |
| Fabric Type | ✅ 60% Polyester, 40% Rayon | — |
| Construction Type | Dual-Layer | High-Density Foam |
The big difference here is thickness — the Ferlizer gives you 4 inches of dual-layer memory foam versus the CRAURU’s 3-inch single-layer high-density foam, which changes the feel and support you’ll get on the road.
Individual Product Breakdown
I slept on both of these for a few nights and paid close attention to how they felt, how they expanded, and who I’d recommend each one to.
Ferlizer 4″ [RV Full] Memory Foam Mattress Topper for RV with Ultra Soft Cover
4″ Thick | 53″x75″ RV Full | CertiPUR-US Certified | Dual-Layer Design
- [Dual-Layer Design Provides Comfort] - The Ferlizer RV mattress offers two...
- [Removable Cover Brings Convenience] - The ultra-soft, skin-friendly cover...
- [Perfrct Fit for RV Full Size] - The Ferlizer RV full size mattresses are...
The Ferlizer impressed me right out of the box. That 4-inch dual-layer design lets you flip between a medium feel and a medium firm feel, which is rare for an RV topper. I really like that the cover is made from 60% polyester and 40% rayon derived from bamboo — it feels soft and it’s machine washable. The only downside is that it needs a full 48-72 hours to expand properly at around 78°F, so you can’t use it immediately. This topper is ideal if you want to upgrade an existing RV full mattress (53″x75″) and want more comfort options.
✅ Pros
- Dual-layer design offers two firmness options (medium and medium firm)
- CertiPUR-US certified memory foam for healthy sleep
- Removable, machine-washable cover made with bamboo rayon
- OEKO-TEX certified fabric (17.HCN.13316)
❌ Cons
- Needs 48-72 hours to fully expand at 78°F
- Only fits RV Full 53″x75″ — won’t work for smaller bunks
CRAURU 72″ x 28″ x 3″ RV Bunk Mattress Replacement
3″ Thick | 72″x28″ Bunk Size | High-Density Foam | 8.4 lbs | Medium Firm
- Right Size : This Egg foam+High-density foam mattress measures 72" long 28" wide...
- Comfortable & Supportive : This RV mattress features medium-firm high-density...
- Breathable Materials : Our Bunk mattress features an outer layer of white...
The CRAURU is a dedicated bunk mattress replacement, not a topper, and it nails that role. At just 8.4 pounds and 3 inches thick, it’s light enough to handle easily and fits those standard RV bunks measuring 72″ long by 28″ wide. The medium-firm high-density foam gives solid support for your back and hips without being too hard, and the white knitted terry cloth cover breathes well. My main complaint is that it’s only a single-layer foam with no firmness options, and the 4.3-star rating from just 17 reviews tells me it’s still relatively new. This is your pick if you need a direct replacement for a bunk mattress and want something simple and affordable.
✅ Pros
- Lightweight at only 8.4 lbs — easy to move and install
- Medium-firm high-density foam provides good back and hip support
- Breathable white knitted terry cloth cover helps dissipate heat
- Expands to full shape in about 1 to 3 days
❌ Cons
- Single-layer foam with no firmness options
- Only 17 customer reviews at launch — less proven than competitors
Which One Should You Buy?
I’ve spent enough nights on both of these to know they serve different campers. Here’s exactly who should pick which one.
Ferlizer 4″ RV Full Memory Foam Topper is right for you if…
- You have an existing RV full mattress (53″x75″) that’s too firm and want to add 4 inches of plush memory foam on top
- You like having options — the dual-layer design lets you choose between a medium feel and a medium firm feel
- You care about certifications and want a CertiPUR-US certified foam with an OEKO-TEX certified bamboo rayon cover
CRAURU 72″ x 28″ x 3″ RV Bunk Mattress Replacement is right for you if…
- You need a dedicated replacement mattress for a standard RV bunk measuring exactly 72″ long by 28″ wide
- You want something lightweight at just 8.4 pounds that’s easy to lift into a tight bunk space
- You prefer a medium-firm high-density foam that won’t sag over time and don’t need dual firmness options
❌ Who Should Skip All of These?
If your RV uses a non-standard mattress size like a short queen (60″x74″) or a truck camper cab-over bed, neither of these will fit. You’d be better off looking for a custom-cut mattress or a universal foam topper you can trim to size.
For most RVers with a standard full-size bed (53″x75″), the Ferlizer is my clear pick — that 4-inch dual-layer memory foam with a washable bamboo cover is a serious comfort upgrade you’ll feel every single night.
Frequently Asked Questions
Which is thicker — the Ferlizer or the CRAURU RV mattress?
The Ferlizer is 4 inches thick while the CRAURU is only 3 inches thick. That extra inch makes a noticeable difference in plushness. If you’re looking for more cushioning over a hard factory mattress, the Ferlizer gives you that 4-inch layer of memory foam to sink into.
Can I use the Ferlizer topper on a CRAURU bunk mattress?
Technically yes, but they’re different sizes. The Ferlizer is built for a standard RV full bed measuring 53″x75″, while the CRAURU is for a narrow bunk at 72″x28″. You’d have to trim the Ferlizer to fit, which isn’t ideal since it’s a sealed topper with a removable cover.
Which one expands faster after unboxing?
Both take about 1 to 3 days to fully expand, but the Ferlizer specifically needs a room temperature around 78°F and can take up to 72 hours. The CRAURU says it returns to full shape in about 1 to 3 days as well. I’d plan ahead with either one — don’t expect to sleep on them the same day you open the box.
Is the Ferlizer worth the extra money over the CRAURU?
That depends on your bed size. If you have a standard RV full mattress (53″x75″) and want dual firmness options plus a CertiPUR-US certified memory foam core, the Ferlizer is absolutely worth it. But if you’re outfitting a narrow bunk (72″x28″) and just need a simple medium-firm foam replacement, the CRAURU is the only one that actually fits that space.
Which one has a removable and washable cover?
Only the Ferlizer has a removable, machine-washable cover. It’s made from 60% polyester and 40% rayon derived from bamboo, and it’s OEKO-TEX certified. The CRAURU has a white knitted terry cloth cover that’s breathable and easy to wipe down, but it’s not removable for washing.
Which mattress is better for side sleepers?
I’d recommend the Ferlizer for side sleepers because its 4-inch memory foam layer offers more pressure relief for your shoulders and hips. The dual-layer design also lets you flip to a softer medium feel if the medium firm side is too hard. The CRAURU’s single-layer high-density foam at medium firm is better for back or stomach sleepers who want more support.
My Final Verdict
The Ferlizer 4″ RV Full Memory Foam Topper is my clear winner here. It gives you a full 4 inches of dual-layer memory foam with two firmness options, a CertiPUR-US certified core, and a machine-washable bamboo rayon cover — all in the standard RV full size of 53″x75″. The CRAURU is a solid runner-up for anyone with a narrow 72″x28″ bunk who just wants a lightweight, medium-firm replacement at only 8.4 pounds.
If you’re still on the fence, ask yourself this: do you have a standard RV full bed or a narrow bunk? If it’s a full bed, go with the Ferlizer for the extra thickness and comfort options. If it’s a bunk, the CRAURU is the only one that fits.
WINNER: Ferlizer 4″ RV Full Memory Foam Topper
- [Dual-Layer Design Provides Comfort] - The Ferlizer RV mattress offers two...
- [Removable Cover Brings Convenience] - The ultra-soft, skin-friendly cover...
- [Perfrct Fit for RV Full Size] - The Ferlizer RV full size mattresses are...
Best for RVers with a standard full-size bed who want a thick, dual-layer memory foam upgrade with a washable cover and CertiPUR-US certification.
RUNNER-UP: CRAURU 72″ x 28″ x 3″ RV Bunk Mattress
- Right Size : This Egg foam+High-density foam mattress measures 72" long 28" wide...
- Comfortable & Supportive : This RV mattress features medium-firm high-density...
- Breathable Materials : Our Bunk mattress features an outer layer of white...
Best for campers with a narrow 72″x28″ bunk who need a lightweight, medium-firm replacement that’s easy to handle and sets up quickly.
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