Adjustable: These assembled face shields come with a ratchet suspension headgear and a twist knob allowing easy customization of height and fit; The convenient system gives you flexibility to handle various types of grinding, brazing & cutting operations. Material: The double crown headgear & face shield provides wraparound protection for tough working conditions; The premium clear acetate window curves naturally to fit facial contours ensuring reliable protection from splashes, particles & flying debris. Assembly: This large, high impact polycarbonate crown and chin guard combo allows for increased clarity and extra protection around the neck; Provides excellent above-the-head coverage & allows for increased air circulation. Certified: Our safety face shield with ratchet headgear is proudly made in the USA and meets ANSI Z87.1+ and CSA Z94.3 standards; Replacement parts available for lower cost of ownership – not required to repurchase a complete unit.