Tyndale Men's FRC FRMC Long Sleeve Mock Turtleneck FRMC? Made in USA 6.4oz. FRMC Interlock; INHERENTLY FLAME RESISTANT FABRIC Rib knit collar and cuffs; Generously cut Flash fire rated; Exterior Tyndale FR, arc rating, and HRC labels Made in the USA by Tyndale Arc Rating: EBT: 10.9 / HRC: 2