... ) washable,removalbe cover any sizes are available memory foam mattress(memory foam pad,memory foam topper) designed consistent with the physiology ... neck,shoulder and waist.product detailsmemory foam pad,memory foam topper,memory foam mattressmaterial- memory foam(memory foam pad)models- single ,twin,kingthickness- ... position;8) Reduces turning when sleeping;9) Helps to improve blood circulation.