By the Mobile Mattress Store Editorial Team · Updated July 2026
UniPon 12 Inch Firm Queen Size Mattress-Hybrid Mattresses in a Box with Back and Lumbar Hip Support, Fiberglass Free, CertiPUR-US Certified-365 Nights Trial & 10 Years Warranty
- Extra Shoulder & Lumbar Support: Designed with a specialized zoned construction, firm queen mattress provides targeted relief for the shoulders and lower back, helping to alleviate tension where it’s needed most. An excellent choice for those who experience discomfort in these pressure-prone areas.
- Enhanced Breathability for Cooler Sleep: Designed with a breathable open-coil structure, this queen size mattress offers up to 10 times more airflow compared to traditional all-foam mattresses. Paired with cooling gel memory foam, it effectively regulates body temperature, ensuring a fresh and comfortable sleep throughout the night.
- Premium Motion Isolation for Undisturbed Sleep: Constructed with individually wrapped 2.0mm reinforced steel coils, this hybrid queen mattress minimizes motion transfer by absorbing movement at the source. Ideal for couples, it helps ensure a quiet, uninterrupted night’s rest—no more being disturbed by your partner’s tossing and turning.
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Offer: 199.99 $
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Replacing your RV mattress is one of the best upgrades you can make to a rig — and it’s easier than most people think. The whole job comes down to measuring correctly, choosing the right RV size, and setting up a bed-in-a-box. Do it in the right order and you’ll go from a thin factory slab to genuine comfort in an afternoon. Here’s the step-by-step.
Step 1: Measure your RV bed the right way
This is the step that makes or breaks the whole project, because RV sizes are non-standard. Remove the old mattress and measure the bed platform itself — not the old mattress, which may have shrunk or been trimmed. Measure the width, length, and available height (headroom above the platform, accounting for any slide-out lid or under-bed storage). Write it down and match it to a standard RV size — RV Short Queen (60″ x 75″) is the most common. Our RV mattress sizes guide lists every dimension.
Step 2: Choose the right size and type
Match your measurements to an RV size, and if you’re between sizes, size down slightly — a mattress that’s a hair small will fit; one that’s too big won’t close the slide-out. Then pick your type: a 6–10 inch memory foam for quiet, contouring comfort, or a thin hybrid if you sleep hot. Confirm the height clears your headroom. Our best RV mattresses guide covers the top picks by type.
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Step 3: Remove the old mattress
Getting the old mattress out of a tight RV can be the hardest part. Tip it on its side, angle it around the slide-out and doorway, and don’t be afraid to fold or flex it — it’s coming out for good. Check with your local waste service or a mattress-recycling drop-off for disposal, since many landfills won’t take mattresses curbside.
Step 4: Set up the new bed-in-a-box
Most modern RV mattresses ship compressed in a box, which is a huge advantage in a tight rig. Carry the box into the RV, place it on the bed platform, then cut the outer plastic wrap slowly so you don’t nick the foam. It’ll begin expanding as air rushes in. Let it expand for 24–72 hours for full comfort (you can sleep on it sooner). Ventilate the rig — the “new foam” smell is normal off-gassing and fades within a few days.
Step 5: Protect it and dress the bed
Add a breathable, waterproof RV mattress protector to guard against spills, moisture, and the wear of RV life, then your RV-sized sheets. A protector also makes the mattress easier to keep clean between trips. Consider a topper down the road if you ever want to soften the feel further.
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Frequently asked questions
How do I know what size RV mattress to buy? Measure the bed platform inside your rig (width x length x available height) after removing the old mattress. Match to a standard RV size like Short Queen; size down if between sizes.
Can I replace an RV mattress with a regular mattress? Usually not without fit problems — RV platforms are non-standard and residential mattresses are heavier and thicker than ideal. An RV-specific size is the safe choice.
How do I get the old mattress out of a tight RV? Tip it on its side and flex it around the slide-out and doorway. For disposal, use a mattress-recycling drop-off, since many landfills won’t take them curbside.
Do RV mattresses come in a box? Most modern foam and hybrid RV mattresses ship compressed, so you can carry the box in and unroll it right on the platform.
The bottom line
Replacing an RV mattress is a straightforward afternoon project: measure the platform (not the old mattress), choose the right RV size and size down if you’re between, wrestle the old one out, then carry in a bed-in-a-box, unroll, and let it expand. Add a breathable protector and your RV sheets, and you’ve traded the thin factory slab for real, comfortable sleep on every trip.
