The Mueller Open Patella Knee Sleeve is engineered to support weak, sore, arthritic, or injured knees. It is constructed from a Neoprene blend, as opposed to natural rubber latex, and has a contoured shape that allows you to wear the sleeve on either your right or left knee. It features a standard patella opening, and is designed to slide on and off with ease thanks to conveniently placed finger pulls. Overall, the product is great for improving circulation, assisting the healing process, and increasing joint flexibility.