Carhartt Medium Regular Heather Gray Men's Work Wear Short Sleeve Pocket T-Shirt. This durable and comfortable shirt is made from 6.75 oz. 100% cotton jersey knit, ensuring long-lasting wear. The rib knit crewneck holds its shape throughout the workday, while the side-seamed construction minimizes twisting for maximum comfort. It features a durable left chest pocket with a sewn-on Carhartt label and a tagless neck label for added comfort.