13-ounce 100% cotton FR duck - High Back with FR elastic suspenders and FR center release buckles - Chap-style double front for durability and increased thermal performance - Multiple tool and utility pockets - Ankle to above knee leg zippers with Nomex FR zipper tape and protective flaps with arc-resistant snap closures - FR melamine buttons at waist - Brass zipper fly with Nomex FR zipper tape - Carhartt FR and NFPA 2112/CAT 2 labels sewn on left chest pocket - Meets the performance requirements of NFPA 70E standards and is UL Classified to NFPA 2112 - CAT - 2 - ATPV(CAL/CM2) - 16.0 - Replaces style# FRR45