100% ring-spun cotton for most color options.Black is 100% CottonPitch Black is 60/40 cotton/polyesterCactus, Sport Grey, Amethyst & Daisy Mist are 60/40 cotton/polyester Antique colors & Sport Grey are 90/10 cotton/polyester.Dark Heather & Heather colors are 65/35 polyester/cotton.Graphite Heather is 50/50 cotton/ polyester.Classic fit, narrow width/rib collar,taped neck and shoulders for comfort and durability.Our sources are partnered with Better Cotton to improve cotton farming globally.Made with OEKO-TEX certified low-impact dyes.This product meets the following Sustainable Style subcategories:*Sustainable Manufacturing: This product meets the OEKO-TEX Standard100.*Socially Conscious Manufacturing: This product was made by a mill whopartnered with Fair Labor Association and was made in a facility that isWRAP certified.