8.8 oz. 100% cotton, 20 singles • 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