6.75-ounce, 100% cotton FR jersey knitLoose Fit (formerly known as Original Fit) - Loose and Original labeling is a change in name only, sizing/fit does not differ. Stock may vary in labeling.FastDry® technology wicks away moisture for comfortCarhartt Force® fights odorsRib-knit Henley collar and cuffsThree-button frontLeft-chest pocketSide-seamed construction minimizes twistingCarhartt FR and NFPA 2112/CAT 2 labels sewn on pocketMeets the performance requirements of NFPA 70E and is UL® Classified to NFPA 2112CAT - 2ATPV (CAL/CM2) - 8.9