A-Tac® Firefighter protective goggles are specifically designed to protect the firefighter in structural, wildland and other emergency situations: passes the 500º five-minute heat exposure test (NFPA 1971-1997). Features a silicone strap anda body with hard coated/anti-fog inner and outer lens. Fits over prescription, safety and sunglasses. Can be removed from the helmet, without tools or modification and worn directly on the head. Includes goggle clips for both traditonal and contemporary helmets; will not interfere with helmet functions. Meets NFPA 1971-1997 and ANSI Z87.1 Ship. wt. 1 lb.