The best camper mattress is sized to your platform, light enough for cargo limits, and built for mobile use. Here's how to choose, plus our honest top pick.

A new mattress often feels extra firm at first because the materials need a break-in period and your body must adjust — most soften slightly over several weeks of use.

Your mattress sleeps hot usually because of dense memory foam that traps body heat, plus non-breathable covers and bedding — hybrids with coils run cooler.

Your mattress likely hurts your back because it's too soft, too firm, or worn out — letting your spine sag or pressing on pressure points all night.

Hip pain on waking usually comes from a mattress that's too firm pressing on the hip, or too soft letting it sink — common for side sleepers on the wrong surface.

You wake up with back pain usually from a sagging or mismatched mattress, your sleep position, or muscle stiffness — pain that eases within an hour often points to the bed.

Morning stiffness comes from hours of stillness, sleep position, and a mattress that doesn't support your spine — stiffness that fades as you move often points to the bed.

Side sleepers usually do best on a softer mattress (about 4–6 out of 10) that cushions the shoulders and hips while keeping the spine aligned.

Back sleepers usually do best on a medium-firm mattress (about 6–7 out of 10). It supports the spine's natural curve without sagging or feeling too hard.

Not always. A medium-firm mattress is usually best for back support, since one that's too firm or too soft can both strain the spine and cause aches.

Your mattress is likely causing back pain if you wake sore but ease within an hour, sleep better elsewhere, or see sagging — these signs point to the bed, not your body.

Make an old mattress more comfortable with a quality topper, a solid supportive foundation, rotation, and better bedding — but a sagging core can only be replaced.