5 oz./yd (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. USMCA Certified.