Honeywell Fibre-Metal FM71 Dielectric Full Brim Hat Mounting Bracket molded from strong, heat resistant Noryl mounts on the front peak of the hard hat and is perfect for use in extended outdoor environments. Bracket features a dual channel mounting system which uses one channel to anchor the bracket to the cap while the other channel holds the window so it can lock into the work position and pivot up or out of the way when not required. The locked channels form a positive seal to keep debris from filtering between the cap and Faceshield.