Designed to withstand the most challenging working conditions High Performance series face shields are constructed from tough heat-resistant Noryl plastic. Unique Channel Grip System locks windows firmly in place maximizing protection against airborne dust dirt and light debris. Non-restrictive mobility allows for ample air circulation to prevent fogging. 3 Crown Ratchet. Safety Headgear Accessory Type: Face Shield; For Use With: Fibre-Metal F4118 Face Shield Windows; Material(s): Noryl; Color(s): Gray. Compliance Standards: ANSI Z87.1 Compliant. Post-Consumer Recycled Content Percent: 0%. Pre-Consumer Recycled Content Percent: 0%.