Features adjustable strap that puts pressure on the elbow to reduce swelling and pain relief Easy to put on left or right elbow Two built in silicone pads to provide pain relief Lightweight and breathable Size(Forearm circumference)= SM: 8-9"; MD: 9-10.5"; LG: 10.5-12"; XL: 12-14" Deluxe Elastic Elbow sleeve gives support to your elbow to help relieve pain related to sprains, strains, golfers/tennis elbow, swelling, and tendonitis. Made with elastic knit material that is lightweight and breathable for a comfortable fit. Allows free range of movement and fits on both left or right elbow.