S209 - M Ironwood Twill Work Shirt Triple-stitched main seams help make Carhartt's snap-front twill work shirt extra durable. Made of 8.5-ounce, 100% cotton twill it features pearl-colored snaps, a spread collar, front and back western-shaped yokes, two chest pockets with flaps and snap closures and a left-pocket flap with pencil slot. *8.5-ounce, 100% cotton twill *Pearl-colored snaps *Two chest pockets with flaps and snap closures