5 oz./yd² (US) 8.1 oz./L yd (CA) 100% preshrunk cotton, 23 singles; Athletic Grey is 90/10 cotton/polyester (US only); Sport Grey is 90/10 cotton/polyester (CA only); Heathers are 50/50 cotton/polyester; Taped neck and shoulders; Double needle cover seamed neck; Double needle sleeve and bottom hem; Quarter-turned body; Tear away label; USMCA Certified; This product meets the following Sustainable Style subcategories:Sustainable Manufacturing: This product meets the OEKO-TEX Standard 100Socially Conscious Manufacturing: This product was made in a facility that holds a SMETA audit certification