Wear it as a layer. Wear it by itself. Wear it with pride. It's as rugged and dependable as your favorite hammer.. Durable 6.75-ounce, 100% cotton jersey knit. 90/10 cotton/poly (Heather Grey). 60/40 cotton/poly (Carbon Heather). Rib knit crewneck and cuffs. Tagless neck label. Left chest pocket. Side-seamed construction minimizes twisting. Carhartt label sewn on left chest pocket. Loose fit