This is the cuff that can be continuously replenished with ice water for long-lasting cold therapy that helps relieve knee swelling and pain. Simply wrap the cuff around your knee with the hook-and-loop straps and attach the tube to the ice water-filled insulated 1/2-gallon cooler that is elevated above it. Gravity then causes the cuff to fill with cold water, completely enclosing a painful, swollen knee joint in a custom-fit cold compress. Unlike misshapen ice packs that provide short-lived, uneven treatment, this comfortable, anatomically-designed nylon wrap can be drained and refilled repeatedly for hours of soothing cryotherapy and consistent compression. Numerous clinical studies—including one by Duke University Medical Center—have proven the cuff’s effectiveness in minimizing pain and swelling, reducing the amount of pain medication needed, and helping patients get back on their feet more quickly after knee surgery. Sizes S (circumference 10-19"), M (18-23"), and L (20-31"). 13 1/2" L x 13" W. Cooler: 12" H x 7" diameter. (3 1/4 lbs.)