6 oz./yd² (US) 10 oz./L yd (CA), 100% cotton, 18 singlesAsh Grey is 99/1 cotton/polyesterHeather Colors & Safety Colors are 50/50 cotton/polyesterAntique Colors & Sport Grey are 90/10 cotton/polyesterSafety Green is compliant with ANSI / ISEA 107 high-visibility standardsInnovation you can feel. Made with 100% U.S. cotton and the latest breakthrough in soft cotton technology, the Gildan® Ultra Cotton family has been remastered for improved printability, quality and comfort you can see and feel.Classic fitRib collar Taped neck and shoulders for comfort and durabilityTear away labelPFD White: 100% cotton with cotton threadNo optical brighteners - allows for more consistent dye adherence.Increased body and sleeve lengths to accommodate shrinkage.Proud member of the U.S. Cotton Trust ProtocolMade 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 by a mill who partnered with Fair Labor Association and was made in a facility that is WRAP certified.