Made of 6.75-ounce, 100% cotton jersey our long sleeve t-shirt makes for perfect workwear layered or worn alone. It features a crew neck with a generous left chest pocket and side-seamed construction to minimize twisting. Ash fiber content is 99% / 1% polyester. Heather gray fiber content is 90% cotton / 10% polyester. Carhartt Men's Workwear T-Shirt Black