Laboratory professionals recommend these top-of-the-line goggles as the best all around impact and chemical splash protection. Single piece, optically correct polycarbonate lens affords full range of vision, even worn over prescription eyewear. Vents are integrated into the lens for a sleek, streamlined appearance. Wide, soft, silicone face seal is unsurpassed for comfort and safety. Adjustable, 7/8" wide neoprene headband has pivoting clips to assist in positioning. Meets performance criteria for ANSI Z87.1-2003 and CSA Z94.3 standards.