This product passes the ANSI Z80.3 drop ball test; the critical impact velocity of the product at -10° C to 42° C is 310 FPS for impact scratched lenses and the critical impact energy of the product is greater than 3 Joules for impact pierced or broken lenses. Highly technical silicone material, skin-friendly and comfortable Removable lenses for use as a separate half face mask Adaptive angle adjustment system The elastic strap attachment adapts to the head shape when worn (sensitivity can be adjusted by loosening and tightening the hexagonal screw) Extension port for lenses: extension port above the lenses for external accessories The user receives a loose part and has to assemble it by himself according to his personal needs Double-sided anti-fog lenses: upgraded process coating, double-sided anti-fog treatment inside and out