Olee Sleep 8 Inch Ventilated Convolution Memory Foam Mattress 08FM01F Polyester/Spandex Imported 3.5 inch convoluted layer structure provides better ventilation and disperses body pressure 1 inch 8 ILD soft memory foam supports body with soft power 2.5 inch 25 ILD HD foam prevents defection of memory foam 1 inch dura flex foam supports final weight before convoluted layer Our memory foam mattress will support body weight evenly, relieve pressure focused on the shoulders, hips, and feet, and eliminate motion disturbance