The Cold One�® Cold Compression Knee Wrap provides quick and efficient relief to stop knee swelling and stop knee pain from an active knee sprain or strain, or recurring injury to the ACL, meniscus, kneecap, or other knee muscles, tendons and ligaments. Icing and compression are combined in a single knee wrap which is comfortable and proven to be an effective aid in healing a swollen knee or injured knee . Doctors and trainers recommend a swollen knee or injured knee be iced for 15-20 minutes several times a day to stop knee pain and stop knee swelling. The swollen knee and knee pain is caused by damage to the blood vessels that supply oxygen and nutrients to soft tissue cells or muscles. The injured soft tissue cells are deprived of the oxygen and nutrients necessary for healthy cells and maintenance of the body's natural healing process. The damaged blood vessels are also unable to remove cell waste. Uncontrolled, this process causes cell death and results in blood and fluid seeping into the damaged portions of the muscle causing swelling and bruising which creates additional injury to the affected area. This additional injury is what prolongs recovery from knee sprains and strains. All Cold One�® wraps are satisfaction guaranteed for 30 days from purchase date. If a Cold One�® wrap doesn't perform to your expectation we'll refund your purchase. IT WORKS!