PROTECT YOUR GAME. Designed by the nation’s top Professional Athletic Trainers and the only MLB Authentic baseball thumb guard, the EvoShield Baseball Catcher's Thumb Guard custom molds in minutes to provide the ultimate thumb protection. This thin guard fits comfortably inside your catcher's glove, helping brace your thumb and protecting you from a jammed thumb, Gamekeepers Thumb and ulnar collateral ligament injuries. Simply remove the Shield from the foil bag to air activate the custom-molding process. The Gel-to-Shell Technology transforms the soft gel pad into a protective Shield in minutes.