The BRUCE BOLT Graduated Compression Sun Sleeves are designed to increase blood flow, decrease muscle vibration, and protectice your skin during your round. STAY FRESH: Graduated compression sleeves increase blood flow to the arms by dilating the player’s arteries by 40% and by compressing the veins.  Increased blood flow means more oxygen which helps the athletes's arms feel rested and “live” throughout your rounds. KEEP YOUR ARM COOL: In addition to keeping your arm feeling “live”, increased blood flow actually keeps you feeling cool and fresh while you golf. REDUCE INJURIES: Our graduated compression arm sleeves also reduce muscle and tendon vibration during the throwing motion, essentially keeping everything in place, which over time helps reduce the potential for injuries. FASTER RECOVERY: Graduated compression sleeves and leggings are used throughout sports to help with recovery after games and practices by removing lactic acid and increasing blood flow and oxygen delivery.  As great as our arm sleeves are for playing, they are just as good for post-game recovery. Simply wear the sleeve for an hour after playing and feel the difference. PROTECT YOUR SKIN: Each sleeve features a SPF50 rating to protect your skin through each round.