The N-Ferno 6828 Fr Balaclava Face Mask Is Made With Stretchable Modacrylic Fleece For Fr Protection And Warmth. This Fr Face Mask Meets Requirements Of Performance Specification Astm F1506; Classified Cat 2 According To Nfpa 70E. Arc-Rated; Atpv Of 10.6 Cal/Cm2; And Meets Performance Requirements Of En 1149, Anti-Static. Stretchable Warm Modacrylic Cotton Fleece Construction Fits Comfortably Under A Helmet Or Hard Hat, Making It The Perfect Winter Gear For Working In Arc Applications. Reflective Accents Offer Visibility At Night Or In Low-Light Conditions. One Size Fits Most And Can Be Worn Alone Or Under Hard Hats, Ski Helmets Or Other Head Protection. Ideal For Those Who Work In Construction, Freight/Baggage, Drilling/Mining, Oil/Gas Refining, Iron/Steel, Delivery/Service, Landscaping/Grounds, Warehousing, And Working In Refrigerated Areas. Can Also Be Worn As A Ski Face Mask Or Worn Hunting, Climbing, Running, Cycling, Boating, Skating Or Other Outdoor Sports.