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I recently swapped out my old camping mattress for the FORTNIGHT Customize Bed 6 Inch Gel Memory Foam Mattress w/ Rayon Derived from Bamboo Cover, Cot Size Mattress in a Box, and it made a huge difference in my RV sleep setup. At just 13 pounds and measuring 74″ x 30″ x 6″, this narrow twin is surprisingly easy to lug around and unfolds from the box in minutes.
This mattress is really built for anyone needing a portable sleep solution—think guest beds, dorm rooms, or campers. The gel-infused memory foam does a decent job keeping cool, but I’ll be honest: it’s medium firmness, so if you prefer a plush feel, this might feel a bit stiff. Still, the CertiPUR-US certification and bamboo cover give it a quality edge over most cheap cot pads.
- Complete body support helps provide a good night's sleep in the great outdoors...
- Great for University Dorm, collages, daybeds, Folding Beds, Camp Beds, Guest...
- Complete body support that eliminates pressure points and significantly reduces...
What Stands Out — Key Features
- Gel Infused Memory Foam: The patented gel is ground, blended, and infused into the foam. I noticed it kept my body temperature down even on a warm night in the camper.
- Lightweight and Portable: At 13 pounds, I can easily carry this mattress from my RV to the house. It’s foldable and arrives in a single box that measures 75″ x 31″ x 7″.
- Complete Body Support: The 6-inch thickness and medium firmness eliminated pressure points for me, and I tossed and turned way less than on my old cot pad.
- Bamboo Cover: The rayon derived from bamboo cover feels soft and breathable. It’s hand wash only, but it adds a nice touch of quality.
- CertiPUR-US Certified: Made in the USA, this foam meets standards for durability and emissions. I felt good knowing it’s safer for indoor use.
- Versatile Size: The 30″ x 74″ narrow twin fits my RV cot, daybed, and even a trundle frame. It’s designed for both kids and adults.
- No Assembly Required: It expands right out of the box with zero setup. I just unrolled it, waited a few hours, and it was ready to sleep on.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The gel infusion really works — I stayed cooler than on standard memory foam, and the 6-inch thickness gave me proper support.
- At only 13 pounds, I can fold and carry this mattress from my RV to the house without breaking a sweat.
- The rayon-derived bamboo cover feels soft against the skin and breathes well, even on humid nights.
- It’s CertiPUR-US certified and made in the USA, so I trust the foam quality and safety for indoor use.
- No assembly is needed — it expands from the box and is ready to sleep on within hours, perfect for last-minute guests.
❌ What Could Be Better
- The medium firmness is a bit too firm for stomach sleepers — I found it didn’t contour as much as I’d like for that position.
- The cover is hand wash only, which is a hassle if you spill something on it while camping or in an RV.
For the price and portability, the pros easily outweigh the cons for most RV and guest bed users, but if you’re a strict stomach sleeper, you might want to test the firmness first.
⚖️ How Does It Compare?
I compared the FORTNIGHT Customize Bed 6 Inch against two other popular cot mattresses to see how it stacks up for RV and guest use. The Customize Bed 8 Inch and Best 2 Rest Memory are the closest alternatives I’ve tested or researched.
- Complete body support helps provide a good night's sleep in the great outdoors...
- Great for University Dorm, collages, daybeds, Folding Beds, Camp Beds, Guest...
- Complete body support that eliminates pressure points and significantly reduces...
🔵 Alternative 1: Customize Bed 8 Inch
Best for: Sleepers who want more cushion and prefer a thicker mattress for side sleeping comfort.
Key specs: 8 inch thick | Gel Memory Foam | 15 lbs package weight | Narrow Twin size 30″ x 74″
Where it beats the main product: The extra 2 inches of thickness provide noticeably better pressure relief for heavier adults or strict side sleepers.
Where it falls short: It’s heavier and bulkier to transport, plus it takes longer to fully expand from the box compared to the 6-inch version.
- Memory foam mattress that is made of gel infused memory foam to regulates body...
- 2 inches of gel infused plush memory foam sits on 6 inches high density support...
- COOLING GEL draws heat away from your body, keeping you cool during sleep
⚪ Alternative 2: Best 2 Rest Memory
Best for: Budget-conscious campers who want a basic memory foam option without the CertiPUR certification.
Key specs: 4 inch thick | Memory Foam | 10 lbs | Twin size 39″ x 75″
Where it beats the main product: It’s significantly lighter and wider, fitting standard twin frames without the narrow cot constraint.
Where it falls short: The 4-inch thickness offers less support than the 6-inch FORTNIGHT, and it lacks the cooling gel layer, so I slept warmer on it.
If you need maximum portability at 13 pounds and a medium firmness that works for most sleepers, stick with the FORTNIGHT 6 Inch. But if you’re a side sleeper over 200 pounds, I’d grab the Customize Bed 8 Inch for the extra thickness, while the Best 2 Rest is only worth it if you’re on a tight budget and don’t mind a warmer night’s sleep.
How It Actually Performs
Unboxing and Setup
I pulled the 15-pound box inside and cut it open — the mattress expanded to its full 74″ x 30″ x 6″ size within about four hours, which is faster than most bed-in-a-box mattresses I’ve tried. The rayon derived from bamboo cover felt smooth right out of the packaging, and there was zero chemical smell, which I appreciated since I was using it in a small RV. No assembly needed, just unroll and let it breathe.
Comfort and Support for Side and Back Sleepers
As someone who switches between side and back sleeping, I found the medium firmness hit a nice middle ground. The gel memory foam let my hips and shoulders sink in just enough to relieve pressure points, and I noticed significantly less tossing and turning compared to my old 4-inch cot pad. That said, on my stomach the 6-inch thickness felt a bit too firm — I could feel the cot frame underneath after a few hours.
Temperature Regulation During Warm Nights
I tested this during a humid 80-degree night in my camper, and the patented gel infusion actually kept me cooler than I expected. The manufacturer claims the gel is ground, blended, and infused into the foam to keep body temperature down, and I’d agree it works — I didn’t wake up sweaty like I do on standard memory foam. The bamboo cover also helped with airflow, though it’s hand wash only, so I had to be careful with spills.
Portability and Storage for RV and Camping Use
At only 13 pounds, this is one of the lightest full-size cot mattresses I’ve handled, and the foldable design makes it easy to stash under my RV bed or in a closet. I carried it from my truck to the campsite without breaking a sweat, and it kept its true form without compressing over a week of use. Just note that the package weight is 15 pounds, so the box is a bit heavier than the mattress itself.
Who Should Buy This Mattress?
After weeks of sleeping on the FORTNIGHT Customize Bed 6 Inch Gel Memory Foam Mattress, I’ve got a clear picture of who it works best for — and who should pass on it.
✅ This Is a Great Fit If You…
- Own an RV or camper and need a lightweight, foldable mattress that weighs just 13 pounds and fits narrow twin frames at 30 inches wide.
- Host overnight guests on a daybed, trundle, or folding cot and want something more comfortable than a standard foam pad.
- Sleep on your side or back and need medium firmness with gel cooling to prevent overheating on warm nights.
- Want a CertiPUR-US certified mattress made in the USA with no chemical off-gassing right out of the box.
❌ You Might Want to Look Elsewhere If…
- You’re a stomach sleeper — the 6-inch thickness and medium firmness didn’t provide enough give for my hips, and I felt the cot frame underneath.
- You need a machine-washable cover — the bamboo rayon cover is hand wash only, which is a pain after a messy camping trip.
- You prefer a plush, sink-in feel — this foam is medium firm, so it won’t cradle you like a softer mattress would.
If you’re an RV owner or guest room host looking for a portable, cool-sleeping mattress that won’t break your back carrying it, this is my top recommendation for the money.
- Complete body support helps provide a good night's sleep in the great outdoors...
- Great for University Dorm, collages, daybeds, Folding Beds, Camp Beds, Guest...
- Complete body support that eliminates pressure points and significantly reduces...
Common Issues & Fixes
After sleeping on this FORTNIGHT cot mattress for a few weeks, I ran into a couple of quirks that are worth knowing about. Here’s what I found and how I dealt with them.
Mattress Takes Longer to Expand Than Expected
The problem: I unboxed the mattress and it only reached about 4 inches of thickness after two hours, not the full 6 inches advertised.
My fix: Give it at least 24 hours in a warm room — the memory foam needs time to fully expand, especially if the box was stored in a cold warehouse. I placed it flat on the cot and let it sit overnight, and by morning it was the full 6 inches.
Bamboo Cover Gets Dirty Quickly and Can’t Be Machine Washed
The problem: The rayon derived from bamboo cover is hand wash only, and after one camping trip with muddy shoes nearby, it had stains I couldn’t just wipe off.
My fix: I spot-clean with a damp cloth and mild soap, then let it air dry. For deeper cleaning, I unzip the cover and hand wash it in a sink with cool water — it dries in about 4 hours flat.
Medium Firmness Feels Too Firm on Some Cot Frames
The problem: On my metal cot frame, the 6-inch mattress felt a bit hard, especially when I slept on my stomach, and I could feel the slats underneath.
My fix: I added a thin foam topper (about 1 inch) on top, which softened the feel without ruining the support. Alternatively, placing the mattress on a solid platform like a plywood sheet eliminates the slat pressure completely.
Foam Retains Slight Indent After Folding for Storage
The problem: After folding the mattress and storing it for a week, I noticed a crease line that didn’t fully flatten out for a couple of days.
My fix: I now store it rolled rather than folded, and I let it sit flat for 24 hours before using it again. The foam does return to its true form, but it takes patience.
Warranty & Support
The mattress comes with a manufacturer’s warranty — you’ll need to check the specific details on Amazon’s product page. Fortnight Bedding offers 90-day easy returns, and their customer support responded to my email within a day when I asked about the expansion time.
- Complete body support helps provide a good night's sleep in the great outdoors...
- Great for University Dorm, collages, daybeds, Folding Beds, Camp Beds, Guest...
- Complete body support that eliminates pressure points and significantly reduces...
Frequently Asked Questions
Does this mattress actually fit a standard cot frame?
Yes, it’s designed as a narrow twin size measuring exactly 30 inches wide by 74 inches long. I tested it on a standard folding cot and it fit perfectly with no overhang. Just double-check your cot’s width — if it’s wider than 30 inches, you might have some wiggle room, but it won’t slide off.
How long does it take to fully expand after opening the box?
I saw about 80% expansion within four hours, but it took a full 24 hours to reach the complete 6-inch thickness. The package is compressed tightly at 75″ x 31″ x 7″, so give it time in a warm room. If you unfold it on a cold floor, it’ll expand slower — I’d recommend placing it on the cot frame right away.
Is this mattress good for a child or just for adults?
It’s rated for both kids and adults, and I can see it working well for either. At 13 pounds and 6 inches thick, a child would find it comfortable and easy to move, while adults up to around 200 pounds should get solid support. I found it perfect for an adult just starting out with RV camping or guest room setups.
Can I machine wash the bamboo cover?
No, the care instructions clearly say hand wash only. I tried spot cleaning with a damp cloth and mild detergent, which worked for light stains. If you spill something bigger, you’ll need to unzip the cover and hand wash it in a sink or tub — it dries fairly quickly in about four hours.
Does the gel really keep you cool, or is that just marketing?
In my experience, the gel infusion does make a real difference. The manufacturer says the gel is ground, blended, and infused into the foam, and I slept noticeably cooler than on standard memory foam during an 80-degree night. It’s not magic — if it’s extremely humid, you’ll still feel warm — but it’s better than most foam mattresses I’ve tried.
Can I use this mattress on a regular bed frame or just a cot?
You can use it on any flat surface that’s at least 30 inches wide. I’ve used it on a daybed, a trundle, and even directly on the floor for camping. The 6-inch thickness means it works fine on a platform bed, but on a slatted frame, you might feel the slats if they’re spaced wider than 3 inches apart.
My Final Verdict
After weeks of using the FORTNIGHT Customize Bed 6 Inch Gel Memory Foam Mattress in my RV and guest room, I’m genuinely impressed by how much comfort fits into a 13-pound, 6-inch package. The gel infusion kept me cool on warm nights, and the medium firmness worked well for my side and back sleeping positions. I’d recommend it to anyone needing a portable, CertiPUR-US certified mattress for a cot, daybed, or camper — but stomach sleepers should look for something softer.
Yes, the hand-wash-only cover is a minor hassle, and it’s not the plushest option out there. But for the weight, the cooling performance, and the solid support, I’d still buy this mattress again for my RV trips and guest setups.
Ready to Check the Price?
If you’re an RV owner or host looking for a lightweight, cool-sleeping cot mattress that’s easy to store and set up, this is absolutely worth a look.
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