ESS 740-0537: The ESS FirePro-1971 structural firefighting goggles redefine advancement with their low-profile frames and anti-fog lenses. They stand out as the most sophisticated goggles in the modern market. The entire goggle series falls under the compliance of Nfpa 1971-2013 Edition, passing the stringent 5-minute, 500F oven test. Moreover, these goggles are U.S. Federal Osha compliant and surpass the criteria set by Ansi Z87.1-2015. They are classified as Primary Eye Protection according to Nfpa 1500. Every component of the ESS FirePro-1971 goggles is designed to resist heat and flames.The FirePro-1971 FS model stands out with its unique one-piece, wrap-around strap that effortlessly attaches to any helmet through Velcro tabs. This innovative system ensures that the goggles are always available when needed, allowing for swift detachment if necessary. This particular design is recommended for use in the absence of face shields.