1. 6mm Thin. Re-moldable. Perforated for best fit and breathability. BPA, Latex, PVC, Phthalate free. Diffusix Technology. . SISU NextGen was designed with the athlete in mind, and its unique new features are hyper focused on additional protection and comfort. The SISU Junior guard is designed with the same tooth-protecting technology imbedded in every SISU. With 30% more protection than conventional youth mouthguards, you can rest assured your child's tooth safety is in excellent care. . At 1. 6 mm thin, our Junior mouthguard is so small and comfortable that kids don't feel the constant need to take it out, making for a cleaner mouthguard and a healthier kid. Custom fit, remoldable SISU NextGen features a wider bite pad, rounded edges and improved moldability. Rounded, bevelled edges soften the point of contact between the guard and the mouth, and improvements in the perforation alignment enable maximum dissipation of force 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.