Cap-mounted headgear assembly can be used with any 3M Faceshield to help provide face protection. Designed to fit most hard hat accessory slots. High-strength thermoplastic crown provides impact resistance. 3M Cap Mount Hard Hat Headgear H18 versatile headgear assembly can be combined with any 3M faceshield for face protection. This high-strength thermoplastic cap-mount headgear provides impact resistance and features a unique system that allows window replacement in seconds. Meets ANSI Z87.1-2010 requirements. Sold per each unit.