The STX Assault Lacrosse Arm Guard is made with High Def Polymers to provide lacrosse players with ultra-lightweight protection. The Assault Lacrosse Arm Guard has a three quarter design to allow for maximum protection in crucial areas and has a lower profile look as well. The Assault comes with a full length, breathable sleeve for comfort and mobility. The sleeve is a non-slip sleeve. It has silicone nubs so the Assault won't slip down during lacrosse games.