Select from the available sizes. Hybrid memory foam mattress. Multi-layer gel and foam construction. Pocketed springs for extra support. Cooling ICEfiber cover. Manufacturer's 10-year limited warranty. Treat yourself to a better night's sleep by replacing your old, sagging mattress with the Pure Posture Lux Cool 12 in. Hybrid Mattress with Ice Fiber. This cutting-edge mattress is a foot thick and made from layers of premium materials to ensure an ideal combination of softness and support. A pocket-coil core makes sure your body is supported to help relieve joint stress. Seven layers of latex, Air Flow Gel foam, and Gel Lux foam provide the supple memory foam softness you need to sleep soundly. The mattress also features an ICEFiber cover that maintains a cool 72-degree temperature to help lull you into slumber more quickly. Select from the available size options.DimensionsTwin XL: 79L x 38W x 12H in.Queen: 79L x 59W x 12H in.King: 79L x 75W x 12H in.California King: 83L x 81W x 12H in.