[XX-Large Navy]

This National Safety Apparel U52FKSR navy blue long underwear bottoms are a breathable, stretchy, flame-resistant base layer for regulating body temperature. They are made of a 5.5-oz. flame-resistant modacrylic blend fabric for resistance to flash fire and electric arc and are 68% modacrylic / 29% viscose / 3% spandex. They are machine washable. These flame-resistant long underwear bottoms meet Fire Protection Association (NFPA) Standard 70E, with a Hazard Risk Category (HRC) rating of 1, Occupational Safety and Health administration (OSHA) 1910.269, and ASTM International F1506-10a. They have an Arc Thermal Protective Value (ATPV) of 4. Made in USA.

National Safety Apparel manufactures personal protective clothing and safety apparel for industrial environments that require protection from electric arc, heat, and cuts. The company, founded in 1939, is headquartered in Cleveland, OH.