Casper One Mattress

The Casper One is specifically engineered with a firm feel, which is optimized for stomach and back sleepers who need extra support to maintain proper spinal alignment. If you are a dedicated side sleeper, you may find this mattress too firm, as it lacks the deep contouring usually required to cushion the shoulders and hips.

This mattress features built-in temperature regulation designed to keep you cool while you sleep. While foam mattresses are traditionally known for trapping heat, the materials used here are engineered to promote airflow and prevent overheating.

Because this is an 11-inch foam mattress, it performs best on a solid, flat surface. You can use it with a platform bed, a slatted base with slats spaced no more than 4 inches apart, or an adjustable bed frame.

No, the mattress is designed to balance firmness with pressure relief. The foam construction is intended to support your body weight evenly, which helps alleviate pressure points while still providing the stable, firm surface that back and stomach sleepers typically prefer.

The Casper One Twin mattress measures 75 inches long by 38 inches wide. With an 11-inch profile, it offers a substantial height that fits standard twin-sized bed frames and bedding.