5.3 oz., pre-shrunk 100% cotton. Ash is 99/1 cotton/polyester. Sport Grey is 90/10 cotton/polyester. Graphite Heather and Safety colors are 50/50 cotton/polyester. Safety Green is compliant with ANSI/ISEA 107 Double-needle stitched neckline, bottom hem and sleeves. Seamless 7/8" collar Quarter-turned Taped neck and shoulders. Tearaway label. Rib cuffs.