5 oz./yd, 100% pre-shrunk cotton. Light Steel is 90/10 cotton/ polyester. Charcoal Heather and Oxford Grey are 50/50 cotton/ polyester . Classic fit. Set-in 1x1 ribbed crewneck. Self-fabric neck tape for comfort. Double-needle sleeves and bottom hem. Quarter turned body. CPSIA tracking label compliant. Tear away label.