This is the sleeve that provides pain relief and speeds recovery for aching muscles and joints with a combination of hot/cold therapy and 360-degree compression. Made with a unique Hydra-Gel that stays soft when frozen, the sleeve conforms to your body and provides full coverage to address pain in the legs, knees, ankles, forearms, elbows, and wrists while allowing full range of motion. Eliminating the need for messy ice bags and cumbersome wraps or straps, it slips on easily and remains comfortable while bending joints. For cold therapy, simply placing the sleeve in the freezer for two hours provides 15-20 minutes of treatment for acute injuries with swelling such as ankle sprains, muscle strains, post-game recovery, and more. Can also be heated in the microwave to help ease muscle and tendon soreness, loosen tight muscle, relieve aches, and more. Wipes clean with a damp cloth. Sizes Small/Medium, Large, and Extra Large. See Hammacher.com for detailed sizing information.