Dmi Foam Mattress Topper, Egg Crate Foam Pad, Mattress Pad And Bed, 56 X 78 X 2. "This best selling foam mattress topper is designed for comfort with sculpted medical grade foam providing both air circulation and weight distribution for optimal support and pressure relief. The egg crate or convoluted foam helps prevent pressure sores, pressure point stress, bed sores, fevers and ulcers allowing the skin to breathe without full contact on the mattress". Soft, comfortable sculpted medical-grade foam provides great air circulation and weight distribution. Egg crate foam is ideal for prevention of pressure sores, pressure point stress and decubitus ulcers. Made in USA Unroll pad and allow to sit for several hours to allow pad to expand to its maximum size. Foam meets Cal 117 requirements.