4.5 oz., 100% combed ringspun cotton fine jersey Ash is 98/2 CVC Colors are 60/40 Heather is 93/7 combed ringspun cotton/polyester Ash and White are sewn with 100% cotton thread Ribbed collar Shoulder-to shoulder self-fabric back neck tape Double needle sleeves and bottom hem Side seam construction EasyTear label Machine washable/ tumble dry low.