BUILT TO WORK AS HARD AS YOU DO: Our combined, top of the line, latex-free material, premium stitching, and flexible breathable fabric, create a high-quality product that stays in place and lasts through every jog, run, squat & dive. MOISTURE & ODOR PREVENTION: The 6500 Hex Sleeve is equipped with antimicrobial and airflow vented technology to reduce odor, bacteria, and moisture, so you can stay comfortable through the toughest workouts in any weather or terrain. EASE OF USE: Simply slide on right or left arm and place pad over elbow. Should fit tight without constricting feel. PREVENTS & PROTECTS, LIFTS & COMPRESSES: Our products help prevent and heal medial & lateral instability, meniscus injuries, minor ligament sprains, hypertension, arthritis, & more. Only our sleeve boosts therapeutic heat for improved blood flow SIZED TO FIT MOST: XS: 11.5L-12.5W in. (29.2-31.8W cm.), Small: 12.25-13.25W in. (31.1-33.7W cm.), Medium: 13-14W in. (33-35W cm.), Large: 13.75-14.75W in. (34.9-37.5W cm.) XL: 14.5-15.5W in. XXL: 15.25-16.25W in. (38.7-41.3W cm.), XXXL 16-17.5W in.