Best Car Camping Mattress by Vehicle Size
The best car camping mattress is the widest one that lies flat between your wheel wells: 25 to 30 in singles fit any SUV, a 41 in double fits most, 52 in needs a van.
The best car camping mattress is the widest one that still lies flat between your wheel wells, which is a number no mattress review gives you and no carmaker publishes. For sleeping inside an SUV, a 25 to 30 inch wide single pad (the Exped MegaMat 10 or the Hest Foamy) fits every vehicle measured below, because the narrowest wheel-well gap we found is 39 inches. A 41 inch double (Exped MegaMat Duo 10 in the Medium size) fits a cargo floor of 42 inches or wider, which covers the Explorer, 4Runner, CR-V, and Outback but not a RAV4 or Prius. The 52 inch doubles that top the gear-site rankings only lie flat in a minivan. For sleeping in a tent next to the car, buy whatever is thickest and widest, because the constraint disappears.
Measure three things before you buy anything
Fold the seats, then take three measurements with a tape. First, floor length: from the inside of the hatch sill to the back of the front seats, with the front seats where you will actually leave them (all the way forward for sleeping, or where a driver sits if you will not move them). Second, width at the narrowest point between the wheel-well humps, at floor level. Third, the step where the folded seatbacks meet the cargo floor; on a 4Runner it is about 2 inches, on a Bronco about 4, and a foam pad bridges a step better than an air mattress does. If your length comes up short, remember that the measurement to the front seatbacks is what matters for a pad, and you can gain 8 to 15 inches by sliding the front seats forward and tilting them.
Cargo floor numbers for common vehicles
No manufacturer publishes a flat-floor length or a wheel-well width; they publish cubic feet. The numbers below are from owners who put a tape in their own vehicle, plus one Ford press figure, and they are good enough to pick a pad width. Confirm length in your own car because front-seat position moves it by a foot.
Ford Explorer, 2016 (fifth generation): an owner on the Explorer Forum measured about 83 inches to the front seatbacks with both rear rows folded and roughly 41 inches between the wheel wells. That is why “mattress for Ford Explorer 2016” has a simple answer: any 77 to 80 inch single, or the 41 inch Exped Duo Medium if the wells really are 41 and you do not mind it snug. Ford Bronco, four-door: Ford itself quotes 6 ft 6 in of enclosed sleeping length with the rear seats folded and front seats forward, 3 ft 7 in of width, plus 10 inches of elbow room at the rear door recesses. Toyota 4Runner, fifth generation: an owner measured about 43.5 inches between the wells with a 2 inch step at the seatbacks; reported lengths range from 66 inches to the folded seatbacks to around 76 with front seats forward. Toyota RAV4, 2019 to 2025: about 71 inches to the tailgate, 64 of it flat, and 39.4 inches at the narrowest point. Honda CR-V, 2023 and later: about 73 inches long and about 44 inches of usable floor. Toyota Prius v wagon: 39 inches between the wells and 70 inches to the lower seat with the front seat back; the liftback is narrower still in practice. Minivans are the exception to all of this; a Honda Odyssey with the second row removed gives about 92 by 48 inches.
Single pads: the safe choice for every SUV
A 25 inch pad is a bit narrow for a side sleeper who rolls, and 30 inches is the sweet spot inside a vehicle: it clears a 39 inch well gap with room for a water bottle, and two 30 inch pads will not fit side by side anywhere except a van, so stop trying. Self-inflating foam pads in the 3.9 to 4 inch range (R-value 7 to 9) are the category to shop in; they do not need a pump, a pinhole does not strand you on the floor, and the foam is what makes them warm on a cold cargo floor. See car camping in winter without a heater for why the R-value matters more in a car than it does in a tent.
Double pads: only one width fits most SUVs
The doubles that win gear-site awards are 52 to 53 inches wide (Exped MegaMat Duo LW+, Nemo Roamer Double Wide). In every SUV in the table they sit on top of the wheel wells, which puts the outer third of the mattress 4 to 6 inches higher than the middle. The Exped MegaMat Duo 10 in the Medium size is 41 inches wide and is the only double from a major maker that drops between 42 to 44 inch wells. It is 72 inches long, so a 6 ft 2 in person’s feet hang off the end, but it beats sleeping on a slope. Two people wider than that need a vehicle-shaped air mattress or a van.
Vehicle-shaped mattresses
A few air mattresses are cut to the shape of a cargo area: full width above the wells and a narrower section that drops between them. The AirBedz XUV is 66 inches long, 52 wide, and 10 tall, with a 43 inch section at the tailgate end, and a built-in rechargeable pump. The Exped MegaMat Auto is a 76 inch foam pad that steps from 52 to 36 inches wide for the same reason, though Exped’s own page for it was down when we checked, so confirm it is still sold. Rightline Gear’s T-shaped SUV air mattress is listed as discontinued at retailers; do not chase it.
Mattresses that fit
Exped MegaMat 10 LXW
The long-extra-wide size is 77.6 x 30.3 x 4 inches, R-value 8.1, 5 lb 11.5 oz, and packs to 31.1 x 9.8 inches. The 30 inch width is the widest single that still clears a 39 inch well gap, and 4 inches of foam bridges a 2 inch seatback step. Check price on Amazon
Hest Foamy Wide
78 x 30 x 3.9 inches of solid foam, R-value 8.8, about 11 lb. No valve, no pump, no leaks, which matters when a pad lives in a car full of gear. Heavy and bulky to carry, but inside a vehicle it just rolls up behind the seats. Check price on Amazon
Exped MegaMat Duo 10 Medium
72 x 41 x 4 inches, R-value 8.1, 7 lb 4.5 oz, packed 22 x 11 inches. The 41 inch width is the reason it is here: it is the double that lies flat in a 42 to 44 inch cargo floor instead of riding on the wheel wells. Taller couples should look at the LW+ (77.6 x 52) only if they sleep in a van or a tent. Check price on Amazon
Pittman AirBedz XUV
An air mattress shaped for SUVs: 66 x 52 x 10 inches with a 43 inch wide section that drops between the wheel wells, rated to 600 lb, with a built-in rechargeable pump. The compromise is air: it is colder than foam on a winter floor and needs a blanket or thin foam pad on top. Check price on Amazon
Without a mattress, and in a tent
If you have no pad at all, a folded moving blanket or two under a sleeping bag on the folded seats is survivable in summer and miserable below about 50 F, because the floor conducts heat away faster than air does. A cheap closed-cell foam pad from a hardware store is a better emergency fix than a thick blanket. In a tent beside the car none of the width limits apply, so buy the 52 inch double and enjoy it; the only question is whether it fits through the tent door. For a truck owner, the same wheel-well problem shows up in the bed, which is why truck bed tents for the F-150 and Ranger covers bed widths, and sedan owners have a different problem entirely, covered in car camping in a sedan.