SNAP BRIM Arc tested sunshade is the only one of its kind and fits on most all safety hardhats. Arc tested to ASTM F2178 Standards: At 33 cal/cm no ignition. The durable SNAP BRIM provides year-round protection sheltering from rain, dust and snow, and is long lasting - averaging 1-2 years with regular use. The constant shade of SNAP BRIM provides superior sun protection for outdoor workers shielding them from harmful UV rays and also helps keep workers cool, reducing the risk of sunstroke, heat fatigue and dehydration. Includes a detachable Nomex® neck shade for maximum UV protection. SNAP BRIM is light weight causing no long-term wearer fatigue and very easy to use. The durable brim can be attached and detached in seconds and stays firmly attached in windy environments and will not flap in the wind.