The Ariat Duralight Stretch Canvas FR Jacket is a 9.5 oz. FR stretch canvas jacket rated 44 cal/cm2 (CAT 4), built for utility, oil and gas, and industrial workers who need high-level outerwear protection with improved flexibility for daily field work. Its stretch canvas construction supports movement while delivering CAT 4 arc protection for hazardous jobsite environments and changing weather conditions. The shell is a 74% cotton, 24% nylon, 2% spandex Duralight stretch canvas blend, paired with a 9 oz. FR polar fleece lining that adds real insulation for cool mornings, shoulder seasons, and indoor-outdoor work patterns. That combination gives the jacket a 9.5 oz. shell weight that stays lighter than traditional heavy canvas work jackets while still delivering CAT 4 protection, one of the higher arc-rating tiers in the Ariat FR outerwear line. This FR jacket is certified to ASTM F1506, tested to ASTM D6413, and NFPA 2112 compliant, meeting the standards safety programs rely on when selecting CAT 4 outerwear. The Duralight stretch canvas fabric is engineered to improve mobility during climbing, lifting, equipment operation, and repetitive physical movement common in utility and industrial environments, and the stretch construction helps improve flexibility through the shoulders and arms during physically demanding tasks. The full jacket profile provides additional upper-body and arm coverage over FR base layers, FR t-shirts, and FR button down work shirts, letting crews build a CAT 4 outerwear system without needing to stack multiple lower-rated layers. Workers commonly use this jacket as the outer layer in adaptable layering systems that can adjust to changing temperatures and varying worksite exposure conditions throughout the day. Compared to heavier FR outerwear options, the Duralight canvas construction is designed to balance abrasion resistance with reduced weight and stretch mobility during extended wear. Properly cared for, this garment maintains its flame resistant properties for the useful life of the garment. Follow all manufacturer laundering instructions to preserve garment integrity, mobility performance, and protective fabric characteristics.