5.2 oz., 100% cotton; Ash is 99% cotton, 1% polyester; Light Steel is 90% cotton, 10% polyester; Safety colors, Charocal Heather, Oxford Gray: 50% cotton, 50% polyester; Made with sustainably sourced USA grown cotton; Double-needle stitching throughout; Set-in ribbed collar; Shoulder-to-shoulder tape; Tear-away label; "A-" list status from CDP (Carbon Disclosure Project); Energy Star Partner of the Year (14 consecutive years); Every piece of Hanes apparel purchased from our company qualifies for Hanes4Education