Custom fit Replacement Headgear for F400, F500 Series ORS NASCO Made from the highest quality Made from the highest quality material to ensure functionality and durability Provides a reliable seal during welding applications Aggressive cutting action and long tool life pliable headband fits head contours comfortably Overhead band with multiple adjustments helps position the glassholder for the best view of the weld and a comfortable working position Exclusive “free floating” arms balance and stabilize the helmet while minimizing pressure points Strip proof ratchet head size adjustment provides small increment sizing Deeply offset