How many times have you had to tell your players "GET YOUR ELBOW UP WHEN YOU THROW"? Players learn by seeing, hearing and feeling. When one of those is missing it is hard for them to understand what a coach is saying, and harder still to build the muscle memory for the motion.The ThrowMAX is a flexible arm brace made of extremely lightweight material that fits directly on a ballplayer's arm. Two hook and loop straps hold the brace on, and three flexible polycarbonate bars supply resistance that gives instant feedback on the correct and incorrect motion of a throw. A player recognizes immediately when they try to shortcut an overhand throw.Size by height and weight X-Small: up to 79 lbs, up to 4'7" Small: 80 to 109 lbs, 4'8" to 5'2" Medium: 110 to 149 lbs, 5'3" to 5'8" Large: 150 lbs and up, 5'9" and taller Choose throwing arm, size and sport above. The brace is built for the arm you throw with, so order the side that matches the player.