The Evoshield catcher's thumb guard provides customized protection while protecting your current injuries and preventing future injuries. In fact, this thumb protector was designed by the nation's top professional athletic trainers to keep you in the game. The key is the Gel-to-Shell technology, built into the thumb pad, that provides compression and protection a catcher needs without sacrificing comfort and flexibility. This thumb guard is worn under the glove and features custom molding that conforms to the left thumb or the right thumb for a perfect fit. Stay protected and stay in the game with the Evoshield catcher's thumb guard.