100% Cotton. Granite Heather: 60% Cotton/40% Polyester. Oxford Grey: 60% Cotton/40% Polyester. Cotton 5.2 oz. jersey is ringspun with a higher stitch density for durability and softness (Greys are a cotton-rich blend). Narrower ribbed collar streamlines your look. Dyed-to-match back neck tape for no-itch comfort. Athletic fit through the shoulders and body with a narrower bottom hem for a modern fit. Clean-finish single needle stitching at sleeves and bottom hem.