The Shock Doctor (R) Adult Nano Double Mouthguard provides maximum protection in a compact product. Featuring an impressive design this mouthguard is complete with a full wall upper/lower protecting you from impact. Keeping you focused on the game is a GEL-FIT(TM) liner that custom molds to teeth for a tight, secure fit. Wear it the way you want it, coverts into strapped or strapless. FEATURES: Monocoque Shock Frame(R) - Thin wall design that absorbs and disperses impact Tri-Bite - Meant to align and stabilize upper and lower jaw, gel filled bite windows Gel-Fit(TM) Liner - Custom molds to teeth Mora Performance Enhancement - When worn correctly will create separation of the lower jaw from the Condyle jaw joint that may increase strength and performance Convert into strapped or strapless Center breathing channels