High Performance® faceshields are stronger, more durable and more heat-resistant than ordinary faceshields Made from Noryl®, the same material used in Fibre-Metal®'s welding helmets Exclusive channel grip system mounts windows and locks them in place to form a perfect seal from dust, dirt and debris Deeper 4" crown protector extends protection without increasing weight Wide vision 8" x 16.5" wraparound visors provide 40% more protection area than standard size faceshields Visors are 0.060" thick for an extra margin of protection Headgear sold separately All windows meet ANSI Z87.1+ standard for eye and face protection and tested by Honeywell to meet the requirements of the CSA Z94.3 standard.