Unlike typical memory foam that traps heat and creates excessive warmth, this is the 2" thick memory foam pad made of cool, breathable memory foam that fits beneath your fitted sheet to create a soothing layer between you and your mattress. This pads breathable memory foam, or visco, has an open foam structure that reduces heat transfer 5X faster than typical memory foam, maximizing airflow and comfort. The memory foam requires no break-in period and conforms to your entire bodys shape without pressure points using four unique pressure-relieving zones (head, shoulder, torso, legs) that provide maximum comfort and support. King. 75" L x 72" W. (5 lbs.)