Material Is 55 percent Cotton and 45 percent Poly, Washed Long Sleeve BDU Shirt, 2 Front Pockets With Concealed Button, Epaulets, Inside Sleeve Strap Buttons To Allow Long Sleeve To Become Short Sleeve. Dimensions: Inch XS SM MD LG XL 2XL 3XL 4XL 5XL 6XL Chest 21 1/2, 23, 24, 26, 29, 30, 32 1/2, 35 1/2, 37. Material Specs: 55 percent Cotton, 45 percent Polyester.