The Gel Nano Mouthguard offers comfort, high impact shock absorption. The gel liner has been designed to take a self-fit custom impression of your teeth for a secure and comfortable fit throughout the season. With your teeth nestled in the vertical wall frame, the jaw line is secured limiting injury from side impact. Take the personalization of your Shock Doctor product even further by choosing from an array of offered colors. CLASSIC FIT: Traditional and original, all-around performer High impact shock absorption Increased athletic performance Ultimate custom fit