100% cotton, 20 singles Blackberry, Dark Heather, Graphite Heather, Heather Colors, Lilac, Midnight, Neon Colors, Ash Grey is 99/1 cotton/polyester Safety Green is compliant with ANSI / ISEA 107 high-visibility standards Classic width, rib collar Made with OEKO-TEX certified low-impact dyes Natural is not a dyed fabric, the specks that you see are fibers and cotton seeds