6 oz./yd², (US) 10 oz./L yd, (CA), 100% cotton, 18 singles; Ash is 99/1 cotton/polyester; Heather Grey is 90/10 cotton/polyester; Charcoal Heather & Safety Green are 50/50 cotton/polyester; Relaxed fit; Wide 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; This product meets the following Sustainable Style subcategories:Sustainable Manufacturing: This product meets the OEKO-TEX Standard 100.Socially Conscious Manufacturing: This product was made in a facility that utilizes the Higg Index and has implemented Level 2 practices or above, was made by a mill who partnered with Fair Labor Association and was made in a facility that is WRAP certified.