These heat-resistant glasses feature full coverage design, specially made for firefighters. The premium heat-resistant PC lens can withstand instantaneous high temperatures up to 350°C, meeting international fire standard FR5 protection level. The all-around design provides comprehensive eye protection against high temperatures, sparks and thermal radiation. Available in red frame and gray transparent options, each model passes 10,000 heat shock resistance tests. Featuring special heat insulation layer design, they provide over 15 minutes of safe operation time even in sustained 200°C environments. Field tests show these glasses reduce firefighters' eye heat injury risk by 96%.