Two layers of foam for Balanced support and softness: the 3" memory foam top layer is ventilated and breathable for a cooler night's rest while the bottom base layer provides the support your body needs. Memory foam is an extraordinary therapeutic pressure relieving material that gently molds to the shape of the entire body offering personalized support and supreme cushioning just where you need it for the ultimate sleep experience. Unique smooth top sleeping surface. Cover is made from Natural fiber blended knitted fabric. After unpacking, allow 24 hours for the topper to regain its loft. Product Dimensions: 39" x 75"