This is the only mattress topper that enables two sleeping partners to customize the level of firmness for the head, hips, and legs. Its seven built-in hollows accommodate removable foam inserts that adjust firmness for each of the three body regions—adding inserts provides softer firmness; removing inserts provides a pillow-like surface. Inserts must be cut in half to accommodate two sleepers. The hollows can be left empty for a pillow-like sleeping surface. Made from polyurethane foam, the topper adds 3” to height of an existing mattress. 95% polyester/5% spandex outer cover unzips for machine washing.