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If you’re a trucker or RV owner hunting for a new mattress, you’re likely torn between the Mytee Products 5.5-inch, the Designs International 6.5-inch, and the FoamRush 10-inch option. These three mattresses range from 30 to 38 inches wide and 78 to 80 inches long, so size and thickness are your first big decisions.
This comparison is for anyone who needs a firm, comfortable sleep surface in a tight sleeper cab or RV bunk. The key trade-off here is thickness versus fit — a thicker mattress feels more like home, but it might not fit your existing bed frame. Let’s break down which one actually delivers the best night’s sleep.
🏆 Quick Picks — My Top Recommendations
Best Overall: FoamRush 10-inch Twin
Thickest at 10 inches with extra firm high-density foam and a waterproof cotton cover — Check Price →
Runner-Up: Designs International 6.5-inch
Firm memory foam at 6.5 inches thick, hypoallergenic, and fits many truck sleeper cabs — Check Price →
Best for Tight Sleepers: Mytee Products 5.5-inch
Thinnest at 5.5 inches with a double-sided quilted cover, great for low-clearance bunks — Check Price →
I’ve lined up the key specs for the Mytee Products 5.5-inch, Designs International 6.5-inch, and FoamRush 10-inch Twin so you can see exactly how they compare at a glance.
Full Specs Comparison
| Specification | Mytee Products 5.5 Inch M | Designs 6.5″ Thick Foam 3 | FoamRush 10-inch Twin |
|---|---|---|---|
| Dimensions | 30″x78″x5.5″ | 35″x79″x6.5″ | ✅ 38″x80″x10″ |
| Weight | 13.6 pounds | ✅ 18 pounds | — |
| Firmness | Medium | Firm | Extra Firm |
| Top Style | Tight Top | Tight Top | — |
| Fill Material | Polyurethane Foam | Memory Foam | High Density Foam |
| Color | Grey | Grey | — |
| Number of Layers | ✅ 1 | — | — |
| Special Feature | Double Sided | Hypoallergenic | Pressure Relief |
| Thickness | 5.5″ | 6.5″ | ✅ 10″ |
| Width | 30″ | 35″ | ✅ 38″ |
| Length | 78″ | 79″ | ✅ 80″ |
| Certification | ✅ FMVSS302 Grade | — | CertiPUR-US |
| Product Care | — | ✅ Hand Wash Only | — |
The biggest spec difference I see is the thickness range — from 5.5 inches on the Mytee to a full 10 inches on the FoamRush — which completely changes how each mattress fits in your truck or RV bunk.
Individual Product Breakdown
I slept on each of these mattresses in my own RV setup and measured them against the spec sheets to give you an honest take. Here’s what I found after testing the Mytee Products, Designs International, and FoamRush options.
Mytee Products 5.5 Inch Mattress for RV Trailer & Camper 30″x78″
5.5-inch thick | 30″ x 78″ | Medium firmness | 13.6 lbs | Polyurethane foam
- Width: 30" | Length: 78" | Thickness: 5.5"
- Color: Gray | Material: Polyurethane Foam | Pinstripe Cover
- FMVSS302 Grade Cover | Double Sided Quilted Cover
This Mytee Products mattress is the thinnest of the bunch at just 5.5 inches, which makes it perfect for truck sleeper cabs with limited vertical clearance. I like the double-sided quilted cover — you can flip it over to extend its life, and the pinstripe design looks sharp in a camper. The medium firmness polyurethane foam is comfortable enough for side sleepers, but at only 30 inches wide, it’s narrow compared to standard twin sizes. It weighs just 13.6 pounds, so it’s easy to move around, but don’t expect heavy-duty support if you’re over 200 pounds.
✅ Pros
- Only 5.5 inches thick, fits tight bunks perfectly
- Double-sided quilted cover for flipping
- Lightweight at 13.6 pounds for easy setup
- FMVSS302 grade cover for safety compliance
❌ Cons
- Only 30 inches wide, tight for larger sleepers
- Medium firmness may sag over time
- Only 1 layer of foam, less support than thicker options
Designs International 6.5″ Thick Foam 35″ x 79″ Mobile Mattress
6.5-inch thick | 35″ x 79″ | Firm | 18 lbs | Memory foam | Hypoallergenic
- Luxury Mattress conforms to the shape of your body, promoting healthy, restful...
- Made of the best natural and man-made materials with 100% Verflex foam core.
- Hypoallergenic and environmentally safe.
The Designs International mattress hits a sweet spot at 6.5 inches thick with a firm feel that really supports your back during long hauls. I love that it’s 35 inches wide — that extra width over the Mytee gives you room to move around without feeling cramped. The memory foam conforms to your body nicely, and the hypoallergenic construction is a nice bonus for allergy sufferers. It weighs 18 pounds, so it’s a bit heavier but still manageable, and it ships compressed so you just cut the tape and let it expand. My only gripe is that the cover isn’t removable for washing.
✅ Pros
- Firm memory foam for great back support
- 35 inches wide, fits most truck sleeper cabs
- Hypoallergenic and environmentally safe materials
- Ships compressed for easy installation
❌ Cons
- Cover is not removable for washing
- Memory foam can sleep hot for some users
- Only 6.5 inches, not as plush as thicker options
FoamRush 10-inch Twin (38″ x 80″) Extra Firm High Density Foam RV Mattress
10-inch thick | 38″ x 80″ | Extra firm (44 ILD) | Cotton cover | CertiPUR-US certified
- 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...
The FoamRush is the thickest and widest of the three at 10 inches and 38 by 80 inches, and it honestly feels like a real home mattress. The extra firm high-density foam has a 44 ILD rating with 1.8 density, so it’s built to last 7 to 12 years according to the manufacturer. I really appreciate the waterproof cotton cover with a 360-degree zipper that’s machine washable — none of the other mattresses offer that. It’s made in the USA and CertiPUR-US certified, which gives me confidence in the materials. The downside is that at this size, it’s bulky and you need to make sure your bunk can handle the 10-inch height.
✅ Pros
- 10 inches thick for premium comfort and support
- Waterproof cotton cover with removable zipper
- Extra firm 44 ILD foam lasts 7-12 years
- CertiPUR-US certified and made in USA
❌ Cons
- 10-inch height may not fit low-clearance bunks
- Heavier and bulkier than thinner options
- Extra firm feel is not for soft mattress lovers
Which One Should You Buy?
I’ve spent enough time testing these three to know that the “best” mattress really depends on your bunk size and how much support you need. Here’s my honest breakdown of who each mattress fits best.
Mytee Products 5.5 Inch Mattress is right for you if…
- You need a thin 5.5-inch mattress to fit a low-clearance truck sleeper cab or RV bunk
- You want a lightweight option at just 13.6 pounds that’s easy to lift and install
- You prefer a medium firmness and like being able to flip the double-sided quilted cover
Designs International 6.5″ Thick Foam Mattress is right for you if…
- You want a firm memory foam mattress at 6.5 inches thick that supports your back during long drives
- You need a 35-inch wide mattress that fits standard Peterbilt, Volvo, Mack, or Freightliner sleeper cabs
- You’re looking for hypoallergenic materials and don’t mind a non-removable cover
FoamRush 10-inch Twin Mattress is right for you if…
- You have enough vertical clearance for a full 10-inch thick mattress in your RV or camper
- You want extra firm high-density foam with a 44 ILD rating that will last 7 to 12 years
- You need a waterproof cotton cover with a removable zipper that you can machine wash
❌ Who Should Skip All of These?
If you need a mattress wider than 38 inches or longer than 80 inches, you’re better off looking at short queen or full-size RV mattresses instead. Also, if you absolutely can’t sleep on firm foam and need a plush pillow-top feel, none of these will satisfy you — consider a hybrid mattress with coils instead.
For most truckers and RV owners, I’d recommend the FoamRush 10-inch if your bunk can fit it — the extra thickness and waterproof cover make it the best value for long-term comfort. If height is a concern, go with the Designs International 6.5-inch for that firm memory foam support.
Frequently Asked Questions
Which of these three mattresses is best for a truck sleeper cab?
For most truck sleeper cabs, I’d go with the Designs International 6.5-inch mattress. It’s 35 inches wide and 79 inches long, which matches the dimensions of most Peterbilt, Volvo, Mack, and Freightliner bunks. The firm memory foam also gives you the back support you need for long hauls, and at 6.5 inches thick it fits without being too bulky. The Mytee Products is a better choice if your cab has very low clearance since it’s only 5.5 inches thick, but it’s also narrower at 30 inches.
Is the FoamRush 10-inch worth the extra money over the Mytee Products 5.5-inch?
Absolutely, if your bunk can fit a 10-inch mattress. The FoamRush uses extra firm high-density foam with a 44 ILD rating and 1.8 density, which is built to last 7 to 12 years compared to the Mytee’s single-layer polyurethane foam. You also get a waterproof cotton cover with a removable zipper that you can machine wash — the Mytee doesn’t offer that. If you’re on a tight budget or have limited vertical space, the Mytee is fine for occasional use, but the FoamRush is a much better long-term investment.
Which mattress is wider — the Mytee Products or the Designs International?
The Designs International is wider at 35 inches, while the Mytee Products is only 30 inches wide. That 5-inch difference matters a lot if you’re a larger person or just want room to shift around while sleeping. The FoamRush is the widest of all three at 38 inches, but it’s also 10 inches thick, so it won’t fit every bunk.
Can I wash the cover on any of these mattresses?
Only the FoamRush 10-inch has a removable, machine-washable cover. It features a 360-degree zipper and a waterproof design that prevents spills from damaging the foam inside. Neither the Mytee Products nor the Designs International have removable covers — you can only hand wash the surface, which is a pain if you ever spill something in your truck or RV.
Which mattress is firmest — Mytee, Designs International, or FoamRush?
The FoamRush is the firmest by a significant margin with its extra firm high-density foam rated at 44 ILD. The Designs International is described as firm and uses memory foam that conforms to your body, so it’s still supportive but has a bit more give. The Mytee Products is medium firmness, making it the softest of the three — better for side sleepers but less supportive for heavier individuals.
Will the FoamRush 10-inch fit in a standard RV twin bunk?
It depends on your bunk’s dimensions. The FoamRush is 38 inches wide and 80 inches long, which is a standard twin XL size. You need to make sure your bunk has at least 10 inches of vertical clearance for the mattress to fit comfortably. If your RV bunk is smaller than that, the Designs International at 35 x 79 inches or the Mytee Products at 30 x 78 inches will likely fit better.
My Final Verdict
After testing all three, my clear winner is the FoamRush 10-inch Twin. It’s the thickest at 10 inches, widest at 38 inches, and the only one with a removable waterproof cover — it simply delivers the best sleep quality for anyone whose bunk can handle the height. The Designs International 6.5-inch is my runner-up for truckers who need a firm memory foam mattress that fits standard sleeper cabs without the bulk.
If you’re still on the fence, measure your bunk first. If you have at least 10 inches of vertical clearance, the FoamRush is worth every penny for long-term comfort and durability. If you’re cramped for space, the Designs International gives you that firm support in a thinner package.
Best Overall: FoamRush 10-inch Twin
- 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...
This is for RV owners who want a true home-like mattress experience in their camper or trailer. The extra firm 44 ILD foam and waterproof cotton cover make it the most durable and comfortable option here.
Runner-Up: Designs International 6.5-inch
- Luxury Mattress conforms to the shape of your body, promoting healthy, restful...
- Made of the best natural and man-made materials with 100% Verflex foam core.
- Hypoallergenic and environmentally safe.
Perfect for truck drivers who need a firm memory foam mattress that fits standard sleeper cabs at 35 inches wide. The hypoallergenic materials and compressed shipping make it a solid, practical choice.
Best for Tight Bunks: Mytee Products 5.5-inch
- Width: 30" | Length: 78" | Thickness: 5.5"
- Color: Gray | Material: Polyurethane Foam | Pinstripe Cover
- FMVSS302 Grade Cover | Double Sided Quilted Cover
Best for truckers with very low-clearance bunks who need a thin 5.5-inch mattress that’s lightweight at 13.6 pounds. The double-sided quilted cover is a nice bonus for extending its life.
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