Shock Doctor Gel Nano Mouthguard - Adult The Shock Doctor Gel Nano Mouthguard is a high-performance mouthguard for a high-performance athlete like you. Itís specially designed by a team of dentists from a leading school of dentistry for superior protection and usability. Featuring a Gel-Fit liner, the Gel Nano mouthguard custom molds to teeth for a tight, personalized fit. Specialized Tri-Bite technology is used to align and stabilize the upper and lower jaw, enhancing your overall protection and fit. In addition, the monocoque shock frame features a vertical wall extension, helping shield your teeth and protecting your jaw against injuries caused by side impacts. Also included is Mora performance technology that positions the lower jaw down and forward, which increases strength and athletic performance. The gel nano also helps protect against concussions with upper and lower molar cushions. A quick-release tether allows the mouthguard to be used strapped or strapless. Recommended for ages 11 and older.