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I’ve slept on a few truck mattresses that were slightly too small for my cab. It’s a common problem, and you might be wondering if that gap is worth putting up with.
That tiny space can let in cold drafts and shift around every time you turn over. In my experience, a loose fit often ruins a good night’s rest more than you’d expect.
Too Small Mattress Pain Points
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Why a Too-Small Truck Mattress Wrecks Your Sleep
I remember one freezing night in Colorado. I shifted in my sleep and rolled right off my undersized mattress into the cold metal floor of the truck bed.
That jolt woke me up completely. I spent the rest of the night shivering and frustrated, wishing I had just bought the right size in the first place.
The Gap That Steals Your Warmth
That empty space around your mattress isn’t just annoying. It creates a draft tunnel that sucks all your body heat away.
In my experience, even a two-inch gap on each side makes your sleeping bag feel useless. You end up layering on jackets and blankets just to stay comfortable.
Why Your Kids Will Hate It
My kids used to fight over who got the middle spot on our old truck mattress. Nobody wanted to sleep near the edge because they’d slide into the gap.
That constant battle turned camping trips into stressful events. Instead of relaxing, I spent the whole night listening to complaints about cold shoulders and sore backs.
How It Wastes Your Money
I thought I was saving cash by buying a cheaper, slightly smaller mattress. That was a mistake.
I ended up buying foam pads, blankets, and a custom topper just to fill the gaps. All those extras cost me more than a properly fitted truck mattress would have from the start.
How to Fix a Truck Mattress That Is Too Small
After that miserable Colorado night, I knew I had to find a solution. I tried a few different tricks before landing on something that actually worked.
Honestly, the easiest fix was buying a mattress that fit my truck properly. But I know sometimes you already own the mattress and need to make it work.
Fill the Gaps With Pool Noodles
This sounds silly, but it works great. I cut pool noodles to the length of the gap and wedged them between the mattress and the truck wall.
They block the draft and stop you from sliding into the space. Just wrap them in an old towel first so they don’t squeak against the metal at night.
Use a Non-Slip Mat Underneath
A yoga mat or rubber shelf liner under your mattress can stop it from shifting. I used a cheap rubber mat from the hardware store and it made a huge difference.
Your mattress stays put even when you toss and turn. That alone saved my sleep quality on long road trips.
Layer Foam Padding on the Edges
I bought a cheap foam mattress topper and cut it into strips. I tucked these strips along the sides of my undersized mattress to fill the gaps.
It added comfort and warmth without costing much. The whole project took me about twenty minutes.
You know that sinking feeling when you wake up cold and frustrated because your mattress slid away from you again. I got tired of wasting money on temporary fixes that never worked, so I finally grabbed what I use for my own truck now and never looked back.
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What I Look for When Buying a Truck Mattress
After buying the wrong size once, I learned exactly what matters. Here are the things I check before I hand over my money now.
Exact Measurements, Not Truck Model
I used to just search by my truck’s make and model. That was a huge mistake because every cab setup is different.
Now I grab a tape measure and check the actual floor space. I write down the length and width before I even start shopping online.
Thickness That Fits Your Setup
A mattress that is too thick can push you against the roof of your cab. I made that error once and felt cramped all night long.
Measure the height from the floor to your wheel wells or seats. Leave at least two inches of clearance so you can sit up comfortably.
Material That Stays Put
I prefer a mattress with a grippy bottom layer. Foam that slides around on a plastic truck bed liner is the worst feeling when you try to sleep.
Look for a rubberized or textured bottom. That simple feature saved me from waking up in a different spot than where I fell asleep.
Easy to Store When Not in Use
My first truck mattress was bulky and hard to roll up. It took up too much space in my cab during the day.
Now I look for one that folds or rolls tightly. Being able to stash it behind the seat makes a huge difference for daily driving.
The Mistake I See People Make With a Truck Mattress That Is Too Small
The biggest error I see is people convincing themselves a bad fit is fine. They think a little gap won’t matter and they can just deal with it.
I did this myself for months. I kept telling myself it was good enough, even though I woke up cold and sore almost every single time.
The truth is, that gap will never stop bothering you. It will shift, let in drafts, and ruin your sleep night after night until you finally replace it.
You know that feeling when you spend half the night tugging your mattress back into place instead of actually resting. I got sick of that struggle and grabbed what finally solved the problem for me and stopped pretending a bad fit was okay.
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The Simple Trick That Saved My Sleep Instantly
Here is the one thing I wish I had tried before buying a whole new mattress. I took the foam padding from an old camping pad and cut it into long strips.
I wedged those strips all around the edges of my too-small mattress. It filled every gap completely and stopped the cold air from sneaking in at night.
That cheap fix made my undersized mattress feel almost custom-fitted. I slept warmer and didn’t slide off once during the whole trip.
The best part is that this trick takes about ten minutes. You probably already have an old yoga mat or sleeping pad sitting in your garage right now.
Just measure the gaps around your mattress, cut your padding to size, and tuck it in tight. It is not a permanent solution, but it buys you time to save up for the right fit.
I used this method for three months before I finally replaced my mattress. It turned a miserable sleeping situation into something totally bearable for very little money.
My Top Picks for a Truck Mattress That Actually Fits
I have tested a few different options over the years. Here are the two I would recommend if you are ready to stop dealing with a too-small mattress.
North American Big Trucker Firm Layered Foam Truck Mattress — Built for Long Haul Comfort
The North American Big Trucker mattress is the one I use in my own truck right now. I love how the firm layered foam keeps me from sinking into the middle like I did with cheaper mattresses. It is perfect for anyone who sleeps on their back or side and wants consistent support all night.
The only trade-off is that it is a bit heavy to move around, but that weight keeps it from sliding on bumpy roads.
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FoamTouch 8 Inch Gel Memory Foam Mattress — Cool Sleep for Hot Cabins
The FoamTouch 8 Inch Gel Memory Foam Mattress surprised me with how cool it stays during summer trips. I like the gel layer because it pulls heat away from my body instead of trapping it like regular foam does. This mattress is ideal for people who sleep hot or camp in warm climates.
One thing to know is that it is softer than the Big Trucker, so heavier sleepers might want a firmer option.
- ✅ Proudly Made in the USA
- ✅ Premium Gel Memory Foam for Ultimate Comfort – Crafted with 1-inch...
- ✅ High-Density Foam Base for Lasting Support – The 7-inch high-density foam...
Conclusion
If your truck mattress is too small, stop convincing yourself it is fine and just fix it today.
Grab a tape measure, check your actual floor space, and order the right size before your next camping trip — it takes five minutes and will save you from another cold, restless night.
Frequently Asked Questions about Is a Truck Mattress that is Too Small Worth Keeping?
Can I make a too-small truck mattress work with simple fixes?
You can use pool noodles, foam strips, or towels to fill the gaps. I did this for months and it helped with drafts and sliding.
These fixes are temporary though. They will not give you the same comfort and stability as a mattress that actually fits your truck bed.
Will a too-small mattress damage my truck or my sleep?
The mattress itself won’t damage your truck. But the gaps let in cold air and dirt that can make your sleeping area uncomfortable fast.
Your sleep quality will suffer the most. I woke up sore and tired every time I used an undersized mattress for more than one night.
How do I know if my truck mattress is too small?
Measure the floor space where you sleep and compare it to your mattress dimensions. If there is more than an inch of gap on any side, it is too small.
Another sign is if you slide off during the night or feel drafts around your body. I noticed these problems immediately on my first trip with a bad fit.
What is the best truck mattress for someone who needs firm support?
If you wake up with back pain from a mattress that is too soft, you need something with firm layered foam. I know that sinking feeling when your body aches all day after a bad night.
The North American Big Trucker mattress solved this problem for me completely. I sent my buddy who drives long hauls to buy what finally worked for him and he sleeps great now.
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- PROFESSIONAL-GRADE COVERING: Encased in tough, non-woven polyester fabric...
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Which truck mattress stays cool for hot summer camping trips?
Regular foam traps heat and makes you sweat all night long. I remember waking up drenched on warm nights and hating every second of it.
The FoamTouch 8 Inch Gel Memory Foam Mattress pulls heat away from your body instead. I grabbed what I use for summer trips and finally stopped waking up hot and miserable.
- ✅ Proudly Made in the USA
- ✅ Premium Gel Memory Foam for Ultimate Comfort – Crafted with 1-inch...
- ✅ High-Density Foam Base for Lasting Support – The 7-inch high-density foam...
Should I just buy a new mattress or keep trying to fix my old one?
If you have tried pool noodles and foam strips but still wake up uncomfortable, it is time to replace it. Temporary fixes only last so long.
Buying the right size mattress saves you money in the long run. You will stop wasting cash on padding and blankets that never fully solve the problem.