Information Incrediwear's Arm Sleeve is suitable for athletes looking to relieve pain and prevent injury of arm/elbow related conditions or injuries. The Incrediwear Arm Sleeve provides targeted support to reduce muscle fatigue and enhance performance. Small/Medium Size suitable for 13-17", 30-41cm. The benefits of this product include: Alleviate symptoms associated with tendonitis, lymphedema, muscle fatigue, swelling. Incrediwear’s signature fabric blend is embedded with semiconductor elements to provide effortless comfort and exceptional durability. Increases blood flow, reduces swelling, reduces pain, accelerates recovery. Breathable and moisture wicking fabric. Directions and ingredients How To Use Follow instructions on packaging. Wash warm or cold, tumble dry low. Do not bleach, iron or dry clean.Ingredients Made with a blend of 63% Polyester, 27% Nylon, 10% Spandex.