Shoulder Gel Dough + Z GelGel infused Dough memory foam cradles the head and neck to relieve pressure, while an ample layer of liquid Z Gel captures and distributes heat for a comfortable sleep temperature. We combined our best cooling technologies with a unique shoulder recess that offers superb neck support for side sleepers. A removable 100% Tencel fiber cover adds softness and moisture wicking comfort. Side sleeper shoulder recess Heat capturing liquid gel Conforming gel