This heavy-duty 12-ounce 100% cotton sandstone duck fabric is micro-sanded and garment-washed. It has a 100% polyester Sherpa lining. The sleeves on this Carhartt even have a nylon lining with polyester insulation for warmth as well as easy slip-on, slip-off convenience. The attached three-piece Sherpa-lined hood and inner rib-knit storm cuffs attached inside the sleeves will keep the cold away while you work. The Carhartt work fit design features greater mobility; triple-stitched main, a bi-swing back for flexible movement, and pleated sleeves for better range of motion with your arms.