6-ounce, 100% cotton flame-resistant jersey - Meets the performance requirements of NFPA 70E and ASTM F1506 - UL® classified to NFPA 2112 - FastDry™: Sweat-wicking technology keeps you cool and dry - Anti-microbial technology prevents odor - Rib-knit crewneck and cuffs - Side-seam construction minimizes twisting - Carhartt FR and NFPA 2112/CAT 2 labels sewn on left-chest pocket - Oil rig graphic on back -