The most unique feature of the SISU Aero is its super-slim, ultralight design.Up to $50,000-limited dental warrantyWorks With BracesMedium and Large onlyTalk, Breathe, and Drink-with easeRemoldable-up to 20 timesMade In The USADentist DevelopedResearch suggests the taller you are, the larger your dental arch. And thus, a bigger mouthguard is required as height increases. Our new and improved sizing system uses the findings of extensive research and testing to suggest the proper guard for you based on how you measure up. Check out ourSize Chartto find your perfect fit.Details:Small/Medium: 1.6mm thin;Large: 2.0mm thinStarts flat and is molded to the shape of your mouthUp to $50,000limited dental warrantyAero Medium and Large are compatible with braces (Aero Small is not)Aero Small can be used as a junior mouthguard or for adults with smaller mouthsNon-toxic: BPA, BPS, Latex, PVC, Phthalate free