Extra-wide flange for snug and comfortable fit. Indirect venting provides ventilation without allowing contaminants in. Molded polycarbonate lens is hard coated and distortion-free. Fits over most prescription glasses. Also available in a hooded configuration for added splash protection with uvextreme(®) AF coating on inside and outside of lens to prevent fogging, scratching, static and UV radiation. Meets CSA Z94.3 and ANSI Z87.1 standards.