Serta Perfect Sleeper X Knox Mattress

5 support zones designed for full-body spinal alignment and cooling technology with a combination of highly responsive coils and plush, premium memory foam for quilted hybrid comfort.Specifications Brand Name: Serta Collection: Perfect Sleeper X Quilted Model: Knox Comfort Level: Firm Top Style: Tight Top Mattress Type: Hybrid Bed Size: Twin XL | Full | Queen | King | California King Product Details 5 ZoneResponse™ Design: combines coils and contouring memory foam for full-body spinal alignment Perfect Conform™ Memory Foam: premium, graphite-infused memory foam designed to provide targeted pressure relief and redistribute heat away from the body 1” Perfect Conform™ Memory Foam over supportive coils with a classic quilted feel EverCool® Supreme Memory Foam and Cool Twist® Gel Memory Foam available in select models Availability — Available Configurations SKU 500100491-1020 — Firm / Twin XL SKU 500100491-1030 — Firm / Full SKU 500100491-1050 — Firm / Queen SKU 500100491-1060 — Firm / King SKU 500100491-1070 — Firm / California King