If you love sleeping comfortably cool and need head-to-toe support, the 8" Series MyGel memory foam California king mattress is what you've been dreaming of. Airflow memory foam delivers a cooling effect along with contouring support and pressure-relieving comfort. Motion transfer is minimized by the memory foam for an undisturbed sleep. Active charcoal and green tea extract infused into MyGel keeps your mattress fresh. A luxury four-way stretch knit cover tops the mattress and provides a beautifully soft sleep surface that's quite inviting. Foundation/box spring available, sold separately.