This Fibre-Metal faceshield headgear features a 4-inch crown made from Noryl thermoplastic, the same material used in Fibre-Metal welding helmets. Its Model 5000 Speedy-Loop mounting system supports frequent installation and removal, while tool-free mounting works with slotted and non-slotted protective caps without modifying them or affecting their ANSI rating. Fully adjustable to fit Fibre-Metal and major competitive-brand caps, it is SEI certified to current ANSI standards.