The Adrenaline X1 series is new for the 2011-2012 season. These protective models are the next step for young lacrosse players who are taking their game to the next level. The focus is to provide quality, ultra-protective equipment that fits properly and functions without you even knowing it's there. The arm pad includes fully adjustable elastic straps for a custom fit on every player. Internal plastic elbow disks protect you from impact, with tough, single-density protective foam throughout. The X1 Arm Pad is constructed with durable outer nylon in a new fade design. Size M is for players 90-140 pounds, 4'6"- 5'6". Size L is for players 140+ pounds, 5'10"+. Sold in pairs.