Shock Doctor Nano Double Mouthguard, Protects Upper and Lower Teeth, Youth & Adult High-impact technology for high-impact sports Protects, stabilizes both upper & lower teeth/jaw Dual arch structure absorbs and disperses impact away from point of contact Gel-Fit liner custom molds to teeth for tight, comfortable fit Tri-bite stabilizers properly align upper and lower jaw which may increase strength and athletic performance, known as MORA performance enhancement Meets national and state high school rules Latex Free, BPA Free, Phthalate Free NOT FOR USE WITH BRACES