High Performance Faceshield Headgear for use with Protective Caps. F400 4 inches Crown with Quick-Lok 4001 Mounting Cups. Attach to E2Q or P2NQ/P2HNQ Series Hard Hats. Made from Noryl the same material used in our welding helmets. High Performance faceshields are stronger, more durable and more heat resistant than ordinary faceshields.