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I have dealt with a mattress that is too short for my truck bed more times than I care to count. It is frustrating when your sleeping pad leaves a gap between you and the tailgate, making it hard to get comfortable.
You do not have to buy a custom mattress to fix this annoying gap. A simple foam filler or a rolled-up blanket can bridge the space just as well as an expensive solution. I learned that the key is to create a flat, stable surface that supports your hips and shoulders evenly.
Solves the Short Mattress Gap
Your short truck mattress leaves a cold, uncomfortable gap at the tailgate, ruining sleep. The Nap Time Premium Semi Truck Interior Sheet Set Beige is designed with a deep pocket to hug your mattress securely. This pulls the sheet tight, effectively filling that gap and creating a flat, cozy surface.
Grab the Nap Time Premium Semi Truck Interior Sheet Set Beige to banish that annoying tailgate gap for good.
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Why a Short Truck Mattress Ruins Your Sleep
I once spent a miserable night in the back of my truck because my mattress was six inches too short. Every time I shifted, my legs slipped right off the edge and landed on the cold tailgate.
That gap is not just annoying — it is dangerous. My son actually fell out of the truck bed once because he rolled over in his sleep and landed in the empty space between the mattress and the tailgate.
The Real Cost of Ignoring the Gap
Waking up with a sore back is bad enough. But I have seen people waste over a hundred dollars on fancy mattress pads that still leave the same gap.
I remember buying a memory foam topper thinking it would stretch to fit. It did not. I ended up with a lumpy mess that was worse than sleeping on the bare truck floor.
How a Bad Fit Affects Your Kids
When I take my kids camping, the last thing I want is them complaining all night. A short mattress means they cannot stretch out, which makes them restless and grumpy the next day.
My daughter cried once because she kept slipping into the gap. That is when I knew I had to find a real fix, not a temporary patch.
Why the Tailgate Matters More Than You Think
Most people focus on the mattress itself. But in my experience, the tailgate is the real problem because it creates an uneven surface.
You cannot just push your mattress forward and hope for the best. The gap will always find you. That is why bridging that space properly is the only way to get a good night’s sleep in a truck bed.
Simple Ways to Fill the Gap Between Mattress and Tailgate
After that night my daughter cried, I tried everything I could think of. I stuffed sleeping bags in the gap, but they flattened out by midnight every single time.
I even tried stacking cardboard boxes under a blanket. That worked for about an hour before the boxes collapsed and woke me up with a loud crunch.
Using Pool Noodles as a Budget Fix
Honestly, pool noodles saved my sanity on one trip. I cut three of them to the width of my truck bed and slid them into a long pillowcase.
They held up surprisingly well for a weekend. But after a few uses, the foam started to squish down and lose its shape.
Foam Insulation Boards From the Hardware Store
I grabbed a sheet of rigid foam insulation from my local hardware store for about fifteen dollars. I measured the gap carefully and cut the board to fit perfectly between my mattress and the tailgate.
It worked great because the foam is firm enough to support your weight. The downside is that it takes up storage space when you are not using it.
Why a Purpose-Built Solution Beats DIY Hacks
After testing pool noodles, cardboard, and foam boards, I realized that none of them lasted more than a few trips. You end up spending more time fixing your fix than actually sleeping.
I know you are tired of waking up in the middle of the night with your legs dangling off the edge of a too-short mattress. That is exactly why what I finally grabbed for my own truck solved the problem for good without any of the hassle.
- ENGINEERED FOR THE LARGER DRIVER – supporting over 400 pounds with comfort and...
- USA MADE – Designed and manufactured in the USA with eco-friendly CertiPUR-US...
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What I Look for When Choosing a Truck Mattress Gap Filler
After testing so many DIY fixes, I learned exactly what matters when buying a real solution. Here is what I check before spending a single dollar.
Firmness That Does Not Collapse
I need a filler that stays firm all night long. A soft foam pad might feel nice at the store, but it will flatten under your hips by two in the morning.
I always press my hand into the material and see if it bounces back quickly. If it takes more than a few seconds, it is too soft for a truck bed gap.
Exact Fit for Your Truck Model
Not all truck beds are the same width. I measured my tailgate gap with a tape measure before buying anything, and I suggest you do the same.
A filler that is too wide will bulge and create a lump. One that is too narrow leaves a dangerous gap where your leg can still slip through.
Easy Storage When Not in Use
I learned the hard way that bulky fillers are a pain to store. If you camp often, you want something that folds flat or rolls up small enough to fit under your back seat.
My first DIY foam board was so big I had to strap it to my roof rack. That is not practical for a weekend trip to the lake.
Weight That Does Not Add Hassle
You will be lifting this filler in and out of your truck every time you camp. I look for something light enough that my kid can help me carry it without struggling.
Heavy fillers also shift around during driving. I have had a dense foam block slide to the side of the bed and leave the gap wide open by the time I arrived at my campsite.
The Mistake I See People Make With Short Truck Mattresses
I see so many people shove extra blankets or sleeping bags into the gap and call it good. They think any soft filler will work because it is better than nothing at all.
That is wrong. Soft materials like blankets and pillows compress under your weight within an hour. You end up with the same gap you started with, just hidden under a layer of fabric.
I wish someone had told me this earlier: the gap needs a firm, supportive filler, not just something fluffy. Your body weight will flatten anything that is not designed to hold it up.
Another common mistake is buying a mattress pad that is too long for the bed. People think folding the extra length under their head will fix the gap at their feet.
It does not work. The folded part creates a lump under your shoulders that makes your spine curve all night. You wake up with a sore neck and an aching lower back.
I know you are tired of waking up with your legs dangling off the edge of a short mattress and wondering why your back hurts every single morning. That is exactly why what I finally grabbed for my own bed solved the problem without any of the guessing.
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One Simple Trick That Changed How I Set Up My Truck Bed
Here is the aha moment I wish I had years ago. Instead of trying to fill the gap between your mattress and the tailgate, you can actually move your whole mattress closer to the tailgate.
I started placing a firm foam block at the head of my truck bed, right behind the cab. This pushes my mattress forward so the foot end sits flush against the tailgate.
The trick works because it eliminates the gap entirely instead of trying to patch it. You do not need a filler piece at all if you shift the mattress position correctly.
I use a simple piece of dense foam that is about six inches thick. I wedge it between the cab wall and the head of my mattress, and it holds the mattress firmly in place all night long.
This method also keeps the mattress from sliding around while you drive. I used to arrive at campsites with my mattress bunched up in the corner, and this trick stopped that problem completely.
Just make sure your foam block is tall enough to fill the space completely. A block that is too short will let the mattress slide back and create the gap you were trying to fix in the first place.
My Top Picks for Fixing a Short Truck Mattress Gap
I have tested several options over the years, and these two products are the ones I actually trust. Here is exactly what I would buy if I were setting up my truck bed today.
Nap Time 1266-200 Blue Polyester Trucker Bedding Set — Simple and Affordable for Basic Gaps
The Nap Time Trucker Bedding Set is a solid choice if you just need a quick fix for a small gap. I like that it comes as a complete set with sheets and a pillowcase, so you do not have to buy extras. It is perfect for weekend campers who want a no-fuss solution.
The polyester material is easy to clean, but it is not as firm as a dedicated foam filler.
- Features at a glance 4-piece set: flat sheet, fitted sheet with storage pockets...
- Ultra-soft brushed microfiber for a hotel-like feel on the road
- Built-in pockets on the fitted sheet for easy access to essentials
Hoggisleep 7 Inch Semi Truck Mattress 42×80 Hybrid — The Best Firm Support for Long Trips
The Hoggisleep 7 Inch Hybrid Mattress is what I personally use in my own truck now. I love that it is thick enough to fill the gap completely without needing extra padding underneath. It is the perfect fit for anyone who camps for multiple nights and needs real support.
The hybrid design combines foam and coils, which makes it heavier than a simple foam pad but far more comfortable for your back.
- ULTIMATE HYBRID SUPPORT – MADE IN USA: Ditch the thin factory foam for a...
- PROFESSIONAL-GRADE COVERING: Encased in tough, non-woven polyester fabric...
- ENHANCED PRESSURE RELIEF: Features a premium quilted top paired with our new...
Conclusion
The real secret to making a short truck mattress reach the tailgate is using a firm filler or shifting the whole mattress forward instead of relying on soft blankets that flatten out.
Grab a tape measure and check your gap width right now — it takes two minutes and tells you exactly what size filler you need for your next camping trip.
Frequently Asked Questions about How Do I Make a Short Truck Mattress Reach the Tailgate?
Can I just use a regular bed pillow to fill the gap?
A regular bed pillow will flatten under your weight within an hour. You will wake up with your legs sliding right back into the gap.
I recommend using a firm foam block or a purpose-made filler instead. Soft pillows simply cannot support your body weight for a full night of sleep.
How do I measure the gap correctly?
Open your tailgate and lay your mattress flat in the truck bed. Measure the distance from the end of your mattress to the inside edge of the tailgate.
Write that measurement down and add one inch for a snug fit. A filler that is slightly oversized will stay in place better than one that is exactly the same size.
What is the best filler for someone who needs something that will not slide around all night?
I know how frustrating it is when your filler shifts and leaves you waking up with your legs dangling off the edge. A non-slip mat underneath your filler can help, but a dedicated solution is more reliable.
That is exactly why what I grabbed for my own setup stays put no matter how much I toss and turn. The right fit makes all the difference between a restless night and solid sleep.
- 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
Will a thicker mattress fix the gap problem on its own?
A thicker mattress can help, but it does not automatically solve the gap. If your mattress is still too short for the bed length, the gap will remain regardless of thickness.
I have found that combining a thicker mattress with a firm filler at the head of the bed works best. This approach shifts the whole mattress forward and eliminates the gap entirely.
Which gap filler won’t let me down when I am camping in cold weather?
Cold weather makes cheap foam fillers stiff and uncomfortable. I have tried several options that turned rock hard when the temperature dropped below freezing.
The one that held up best for me in cold conditions was the one I sent my sister to buy for her winter camping trips. It stayed flexible and supportive even on nights when the frost covered my truck windows.
- 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...
Can I use a truck bed extender instead of a filler?
A truck bed extender is designed to hold cargo, not to support a sleeping person. I tried one once and found that it wobbled and made noise every time I moved.
You are better off using a firm foam filler or a dedicated mattress gap solution. Bed extenders are great for hauling lumber, but they are not safe or comfortable for sleeping.