5.3 oz./yd (US) 8.8 oz./L yd (CA), 100% cotton, 20 singles. Heather colors, Graphite Heather, Safety colors & Neon colors are 50/50 cotton/polyester. Sport Grey is 90/10 cotton/polyester. Ash Grey is 99/1 cotton/polyester. Safety Green is compliant with ANSI / ISEA 107. Midweight fabric. Classic fit. Non-topstitched, classic width, rib collar. Taped neck and shoulders. Double-needle sleeve and bottom hems. CPSIA Tracking Label Compliant. Tear away label.