The SISU 3D Mouth Guard offers more protection, less mouth guard with effortless fitting. The SISU 3D is designed for unmatched protection, comfort, cleanliness, and remoldability. Though it might not seem possible, we made an even better mouthguard. SISU 3D improves on previous SISU models, and adds a number of new features. The pre-formed shape enhances fitting difficulty and accuracy. Variable material thickness puts protection where it is needed, and comfort where it is desired. It's ideal for football, hockey, lacrosse, basketball, boxing and other contact team sports. All SISU guards can be quickly and easily molded (and re-molded) to the individual user at home with hot water. At only 2.0 mm thick, or 50% thinner than conventional, bulky mouth guards, players wearing the super slim SISU 3D can talk, breathe and hydrate normally with the guard in-place. With SISU guards, superior comfort does not mean sacrificing protection. The SISU 3D is scientifically engineered with Diffusix technology, which uses a non-compressible, perforated material to distribute impact forces over a larger area and reduce risk of dental injury during competition. SISU guards are compatible with braces, but a dental professional should be consulted for proper fitting.