Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and Amazon Prime.If you're a seller, Fulfillment by Amazon can help you grow your business. Learn more about the program. SISU Aero SISU Max SISU GO SISU guards are made from a material that absorbs and diffuses impact throughout the entire mouthguard, meaning that much less impact force is transferred to the teeth. Using one-of-a-kind Diffusix Technology, the impact force is distributed over larger areas, which means less risk of dental injury during competition. Conventional mouthguards are made from a material that's too soft to fully protect teeth from harm. The SISU Aero Mouth Guard offers more protection with less mouth guard. Ideal for soccer, hockey, roller derby, lacrosse, basketball, and other contact team sports, SISU mouthguards feature a wide bite pad, rounded edges for comfort, and easy mold-ability to ensure a perfect fit. All SISU guards can be quickly and easily molded (and re-molded) at home with hot water. At only 1.6mm thick, or 50 percent thinner than conventional mouthguards, players wearing the super slim Aero can talk, breathe and hydrate with the guard in-place. Scientifically engineered with Diffusix technology, the non-compressible, perforated guard material distributes forces over a larger area to reduce risk of dental injury during competition. Guard is compatible with braces, but a dental professional should be consulted for fitting (Sizes Medium and Large are recommended for all ages wearing braces). Available in three sizes: Small fits the mouths of children ages 7-10, or athletes up to 5 feet tall; Medium fits average mouths, or athletes between 5 feet and 6 feet tall; Large fits larger mouths, or athletes over 6 feet tall. SISU mouth guards are backed by a $35,000, one-year limited dental warranty. Guard is free of BPA, PVC, phthalates, and latex. Made in the USA.