CAT 4 | NFPA 2112 | 54 cal/cm² | NFPA 70E Fabric: Durable 12 oz cotton/nylon canvas | 88% Cotton, 12% Nylon. Permanently flame resistant Wind resistant Water repellent Cool Climate Insulation™ for lightweight warmth Chap-style double-front construction Ankle-to-thigh leg zippers Utility and internal access pockets