Beefy, 12.5 oz. 100% cotton canvas, pre-washed for comfort and fit. Heavy-duty Vislon zippered front and side seam zippers for cinching the waist in, or letting it out after dinner. Lined with 280g, 100% polyester double-sided micro fleece. Zippered, fleece-lined hand warmer pockets and a fleece lined collar. Cut low in the back to help protect your backside from nature’s leering perverts… The woodchucks.