HOTER Basketball Shooter Sleeve - Compression Arm Sleeve for Basketball, 1PC/2PCS PACK Stabilize Muscles and Prevent Arm Fatigue: The arm sleeves feature compression to help stabilize arm muscles to reduce the chance of injury and improve circulation. This keeps arms warm and loose, ensuring you performance at your best. UV Sun Protection: You no longer have to worry about applying sun screen to arms when wearing the PureCompression Arm Sleeves. They offer UV sun protection. Anti-odor and Moisture Wicking: The compression arm sleeves are able not only to be worn in cold weather as a thermal sleeve, but also in warm weather. The sleeves are moisture wicking, meaning they don't become heavy with perspiration. The anti-odor yarns prevent the build of bacteria, keeping the arm sleeves feeling fresh. 4-Way Stretch Technology - Excellent, snug fit & retains shape even after multiple washes. The compression in each pair of arm warmers ensures they keep their shape.