Sleep Luxury with Teflon Foam Mattress - Cal King 72 X 84. Our sleep luxury mattress is 6 inches of durable, high-density polyurethane foam that conforms to your body and doesn't lose its shape. Quited cover with FlameWatch. Summer and Winter side for your comfort. 6 inchthick Open-celled polyurethane core, durable and conforms to the shape of your body. Summer Side with Cotton ticking for natural Body Cooling Winter Side with Wool ticking for additional warmth in winter FlameWatch technology - CA TB 603 lab tests designed to prevent intense mattress fire for 30 minutes Resilient, high density polyurethane foam will not lose its shape