This luxurious firm hybrid mattress is a new era of comfortable, cool sleep, featuring our exclusive IntelliFlex Hybrid System which combines memory foam and innersprings, for all-night support and comfort that flexes to support every curve, plus the added benefit of breathable ...This luxurious firm hybrid mattress is a new era of comfortable, cool sleep, featuring our exclusive IntelliFlex Hybrid System which combines memory foam and innersprings, for all-night support and comfort that flexes to support every curve, plus the added benefit of breathable air channels for all-night cooling. The TEMPUR-Indulge Memory Foam Comfort Layers developed by the sleep experts at Tempur-Pedic match the curves of your body to help deliver pressure relief and all-night comfort and support. With a sustainably-sourced TENCEL cover enhanced with a phase change material for a refreshing feel the moment you lie down and all throughout the night.