Attributes . FR Modacrylic Batting Insulation for Warmth: Meets The Performance Requirements of NFPA 70E: UL Classified to NFPA 2112, Shoulder Straps Plus Inner and Outer Pockets: The Heavyweight Duck Construction is Insulated for Extra Warmth: Carhartt FR and NFPA 2112 or CAT 4 Labels Sewn on Left Chest Pocket . Names