1Can be applied for both heat and ice therapy to relieve muscle soreness and relieve sports injuries. 2Hot compresses dilate local capillaries, accelerate blood circulation, reduce pain and eliminate fatigue. 3Cold compresses constrict local capillaries, which can dissipate heat, cool down, and prevent swelling. 4This knee ice wrap is made with an adjustable band, which allows you to wrap around the left or right knee for direct therapy. 5It's designed to relieve knee joint pain, reduce inflammation, and it may help to expedite recovery from surgery.