The STX Surgeon 400 Lacrosse Arm Pads are designed and built to be easy to slip on, since it eliminates straps, and wicks moisture away for comfort. There is silicone tape around the sleeve openings that enhances retention. This arm pad has a 3-piece foam construction which is designed for great protection and mobility. This is the perfect arm pad for a youth player who's advancing in the game. The STX Surgeon 400 men's lacrosse arm pad is a versatile, durable arm pad designed for the intermediate player.