RVs, Campers, and Truck Bunks: The Mattress Sizes Nobody Warns You About

The bed in a recreational vehicle is called a queen and it is not a queen. Buy bedding based on the name and you get five inches of overhang and a fitted sheet that will not stay on.

An RV Queen Is Short

A residential queen is sixty by eighty inches. The common RV version, sold as a short queen, is sixty by seventy-five, and some coaches use sixty by seventy-four. Measure yours.

The Other Sizes You Will Meet

RV king often runs seventy-two by eighty, narrower than a residential king. Bunks show up at twenty-eight, thirty, or thirty-four inches wide, none of which match a mattress you can grab off a shelf.

Boxed Foam Solves the Access Problem

A bedroom slide-out has a doorway you cannot carry a full-size mattress through. A compressed foam mattress from a lineup like Sleep Innovations goes in rolled and expands in place, which is the only practical way in for many floor plans.

Corners Are Sometimes Cut

Plenty of coaches have one or two radiused corners to clear a wall or a closet. Foam can be trimmed carefully with a long electric knife, but measure twice, because there is no undo.

Weight Is a Real Constraint

A thick high-density foam mattress can add fifty to eighty pounds to a vehicle with a published cargo capacity. On a small trailer that number matters, and it competes with water in the fresh tank.

Condensation Under the Platform

RV beds sit on solid plywood over an unheated storage bay. Warm bodies over a cold deck produce condensation on the underside, and that is why so many campers find mold under the mattress in spring.

What Keeps the Underside Dry

• Install a ventilated mat or a plastic grid panel between the platform and the mattress.
• Lift the mattress and prop it open for an hour whenever the coach is parked in dry weather.
• Run a small fan or a dehumidifier in the bedroom during cold weather camping.
• Do not store bedding compressed against the mattress in a closed coach all winter.
• Check the plywood itself for dampness, not just the mattress cover.

Foam Reacts to Cabin Temperature

A camper is not climate-controlled when it is shut down. Memory foam left in a cold coach feels stiff at bedtime and takes far longer than usual to soften to your shape.

Thickness Versus Headroom

Overhead bunks and cabover beds have limited clearance to the ceiling. Adding four inches of mattress can turn sitting up into hitting your head, so measure that gap before upgrading.

The Order to Do This In

Measure the platform, measure the doorway, weigh the option, then shop. Doing it the other way around is how a perfectly good mattress ends up stored in a garage at home.