Carhartt Workwear Pocket Short Sleeve T-Shirt. CTK87Carhartt's bestselling, no-quit, original work shirt. A classic for 25 years., Durable 6.75-ounce, 100% cotton jersey knit, 90/10 cotton/poly (Heather Grey), 60/40 cotton/poly (Carbon Heather, Dark Cobalt Blue Heather), Rib knit crewneck, Tagless neck label, Left chest pocket, Side-seamed construction minimizes twisting, Carhartt label sewn on left chest pocket, Loose fit