At 2. 4mm thin, the sisu max mouthguard offers the most protection of any sisu guard, but is still 30 percent thinner than conventional sports mouth guards. It's custom-fitted so you'll be able to talk, breathe and drink better than ever before. It's really the best of both worlds. Even more protection the max guard is made from our high-tech thermoplastic material that is 50 percent stronger and has 8x greater tensile strength than conventional mouthguard materials. So if you'll be colliding at full velocity into giant competitors at frequent intervals, or if your opponent gets in that one lucky punch before you knock him out, the sisu max is the mouthguard for you. Still less mouthguard even when you wear a max guard, you don't have to sacrifice a more comfortable mouth. The sisu max is only 2.4 Mm thick, making it 30 percent thinner than your typical mouthguard. It's it's really transmitted from the point of impact. Superior protection is not the only function of the perforations. They also allow for flexibility to create an intimate custom fit, so unique to the player's mouth that the guard remains in the mouth during the entire game or practice. Additionally, perforations allow for natural flow of air and saliva to empower athletes to talk normally, breathe naturally and stay hydrated during the game. The best of both worlds.