4.5 oz./yd² (US), 7.5 oz./L yd (CA), 100% combed ring-spun cotton fine jersey; Heather is 90/10 combed ring-spun cotton/polyester; White is sewn with 100% cotton thread; Single needle ribbed binding on neck and sleeve openings; 1" forward shoulder seam; Double-needle bottom hem; CPSIA compliant tracking label on side seam; EasyTear™ label;