Pads come in a variety of sizes, designed to cover 30-40% patient body surface area. Access to patient care areas will not be compromised. Non-sterile, single patient use only. Will not collapse under patient's body weight, ensuring even distribution of water flow and temperature throughout all pads. Water flows through pads via negative pressure circulation, creating a leak-proof system. Not made with natural rubber latex, not made with metal, and radiolucent. 4 pads in a kit - 2 thigh pads and 2 torso pads.