The Aircast Knee Cap is an integrated approach that combines cold and focal compression delivered using a non-motorized, gravity-fed system. Used in conjunction with the Aircast Cap Gravity Cooler (sold separately), it delivers chilled water directly into the anatomically designed Cap to provide maximum cryotherapy, eliminating the risk of tissue damage. The Gravity Cooler holds water and ice needed to provide 6 to 8 hours of cryotherapy, and is compatible with all Cap and Arctic Flow pads. It's ideal for minimizing hemarthrosis, swelling, managing pain, post-operative recovery, trauma, rehabilitation and sports injuries. Universal fit allows the Aircast Knee Cap to be worn on either the left or the right leg.