Game Keeper's Thumb, as known as Skier's thumb, is an injury to the radial collateral ligament of the thumb. This ligament becomes sprained or torn as the thumb is pulled away from the index finger, either from a fall or twisting motion. Inflammation follows the injury and grasping or pinching can become very painful. BioSkin Wrist and Thumb braces work to stabilize the joint and alleviate pain with medical-grade compression and customizable stays and straps.