Fibre-Metal Noryl Cap Mount Adapter with 4" crown headband extends the security without increasing weight and suits easily on the required spectacles or respirators. Adapter integrates a wide vision 8" X 17" windows and screens that offers 40% more protective area and features a slot/pin mechanism with locking cams. The channel grip system mounts windows and grips them in place in a deep recessed channel to secure from dirt and debris. This free floating headgear resists heat and offers durability.