4.5 oz./yd² (US) 7 oz./L yd (CA), 100% combed ring-spun cotton, 30 singles; Heather Grey is 90/10 cotton/polyester; 100% cotton thread on color White; Relaxed fit; Classic width, rib collar; Taped neck and shoulders for comfort and durability; Rib sleeve cuffs; Side seams; Tear away label; American Apparel partners 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 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.