McDavid Hex Shooter Arm Sleeve Details -9mm Hex Technology positioned at the elbow -Arm compression maintains muscle warmth and prevents abrasions and scratches -HDC Moisture Management Technology is all about cool and dry -Machine washable/dryable -Single sleeve Material 80% nylon/20% spandex; polyethylene foam *Elbow Measurements: Bend your elbow to approximately 45 degrees and measure directly over the joint. When ordering a pair, take measurements on both elbows and use the average of the results.*