Shock Doctor Nano 3D Mouthguard The EZGard Shock Doctor Nano 3D Mouthguard is the ultimate self-fit mouthguard that features a lower profile, closer fit and less bulk, providing athletes with improved airflow and the ability to speak freely without giving up a nano speck of protection. Monocoque Shock Frame is a thin wall design, lightweight structure that absorbs and disperses impacts away from point of contact. Exclusive Nano Inner Wall is a semi-flexible polymer wall that helps to enhance fit while minimizing interference against the tongue, improving breathing and speaking. Tri-Bite aligns and stabilizes the upper and lower jaw through front incisor and rear molar, gel-filled, bite windows to enhance fit and protection. A Super-Tight Compression Gel-Fit liner custom molds to teeth for a tight, comfortable fit so you can keep your focus on playing the sport, not wearing a mouthguard. MORA Performance Enhancement means that when fitted and worn correctly, positions the lower jaw down and forward, creating a separation of the condyle jaw joint which may increase strength and athletic performance. A Convertible, quick-release tether allows the mouthguard to be used strapped or strapless. Fits ages 11 and older.