Workt Knee Compression Support Sleeve for CrossFit, Weightlifting, Powerlifting, Exercise & Sports &ndash; Made in the USA with Sustainable & Eco-Friendly Ecoprene Neoprene &ndash; 5MM &ndash; 1 Sleeve DEVELOPED AND ENDORSED by Elite Crossfit Pro Chris Spealler. Rigorously tested in the gym and lab for optimal effectiveness for athletes and anyone desiring superior, comfortable knee support. Made with Ecoprene, this sleeve is the most durable and comfortable sleeve on the market! PREMIUM QUALITY DESIGN: Made with Ecoprene Technology with strong, heavy-duty stitching for repeated, long-lasting use. Durable 4-way stretch Ecoprene ensures maximum compression and stability to increase blood flow and reduce inflammation. Anti-slip sleeves stay in place during your toughest workouts. PROTECT & PRESERVE YOUR KNEES: Helps prevent injury and provides warmth, support and comfort for existing pain, injuries, or post-surgery. Great to use during any physical activity or simply to provide warmth and support to achy knees. AVAILABLE IN 5mm & 7mm: Extra-small, Small, Medium, Large & Extra-Large sizes in a variety of colors. See Product Description below for sizing information and difference between 5mm and 7mm. FREE SHIPPING (USPS First Class) within the continental U.S. Proudly made in the USA. 100% Satisfaction Guaranteed.