Amerisleep AS1

The AS1 is designed specifically for back and stomach sleepers who need a firm, supportive surface to maintain spinal alignment. Side sleepers typically require more pressure relief for their shoulders and hips, so this model may feel too firm and cause discomfort in those areas.

Unlike traditional memory foam that contours deeply, the AS1 uses a specialized open-cell memory foam layer that is responsive and firm. This keeps you on top of the mattress rather than enveloped by it, providing a stable surface that prevents your hips from sinking.

The AS1 is engineered to dissipate heat through its cooling cover technology and open-cell foam structure. While all-foam beds can sometimes retain heat, the materials here are designed to promote airflow and keep the surface temperature neutral.

The AS1 is the firmest option in the Amerisleep lineup, featuring a 10-inch profile with a focus on maximum support. Other models in the collection incorporate thicker comfort layers or softer materials designed to provide more cushioning and pressure relief.

Because the AS1 is an all-foam mattress, it performs best on a solid, flat surface like a platform bed or a slatted base with slats no more than 3 inches apart. This ensures the foam is properly supported and prevents sagging over time.