SISU NextGEN Aero is the newest, most powerful mouthguard from SISU and was designed with the athlete in mind. Made from non-compressible thermo-polymer, SISU NextGEN is engineered to withstand even more impact than the original Aero. Still astonishingly thin at 1.6 mm, the NextGEN delivers even more protection with its scientifically re-designed perforation pattern. Custom fit, remoldable boil-and-bite mouthguard features a wider bite pad, rounded edges and improved moldability to allow athletes to talk normally, breathe naturally and stay hydrated during the game. The NextGen offers maximum protection for full-contact team sports such as roller derby, lacrosse, football and rugby.