Ergodyne CORE Performance Work Wear 7415 Flame-Resistant Base Layer Long Sleeve Shirt, XL 5.8-ounce, 90% Cotton 10% Spandex (body); 5.3-ounce knit, 85% FR cotton/8% Polyester/7% Spandex (side vents) (Pyro safe by Ante) Arc-rated; ATPV rating of 7.4 call/cm2 (body) & ATPV rating of 6.0 call/cm2 (side vents Moisture wicking fabrics and venting for multi-climate comfort Anti-stink treatment helps workers remain unscented