Liquid Nitrogen Protective hat For industrial field anti liquid nitrogen spray Liquid Nitrogen Protective cap prevent cold hat Material: breathable waterproof composite, low temperature, cotton spinning lining, polyester pongee Features: the use of multi-layer composite material, through the production process of precision processing, better protection of the head is not subject to low temperature damage. Uses: used in laboratory research, industrial field, anti liquid nitrogen spray, frozen food processing, low temperature grinding and other places to prevent extreme cold.