Assembly: This large, high impact polycarbonate crown and chin guard combo allows for high clarity and administers extra head and neck protection. Material: This double crown headgear & face shield provides wraparound protection for tough working conditions; The clear acetate window curves naturally to fit facial contours ensuring reliable protection from splashes, particles & debris. Adjustable: These assembled face shields come with a universal slot adapter that fit most slotted hard hats; The convenient system gives you flexibility to handle various tasks in tough working conditions. 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.