Wear our workwear pocket sleeveless t-shirt by itself on hot days or as a layer on cooler ones. Built of tough 6.75-ounce, 100% cotton jersey knit, the Carhartt 100374 features a left-chest pocket for small tools, glasses or pencils. The side-seamed construction minimizes twisting and a tagless neck label eliminates chafing. Clean-finished seams also enhance all-day comfort. Note: Heather Gray is 90% cotton/10%polyester, and Oatmeal Heather is 99% cotton/1%polyester.