5.3 oz./yd² (US) 8.8 oz./L yd (CA), 100% cotton, 20 singles Blackberry, Dark Heather, Graphite Heather, Heather Colors, Lilac, Midnight, Neon Colors, Safety Colors, Sunset, & Tweed are 50/50 cotton/polyester Antique colors & Sport Grey are 90/10 cotton/polyester Ash Grey is 99/1 cotton/polyester Safety Green is compliant with ANSI / ISEA 107 high-visibility standards Classic width, rib collar Taped neck and shoulders for comfort and durability Tear away label Proud member of the U.S. Cotton Trust Protocol Made with OEKO-TEX certified low-impact dyes