5.3 oz./yd² (US), 8.8 oz/L yd (CA), 100% U.S. ring-spun cotton, 24 singles Sport Grey is 90/10 cotton/ polyester Graphite Heather is 50/50 cotton/polyester Softstyle's high stitch density, soft ring-spun cotton and cotton blend fabric offers a smooth printing surface Modern classic fit Classic width, rib collar Taped neck and shoulders Tear away label Responsible Supplier:  this product was made in a facility that is OEKO-TEX and FLA certified. Responsible Materials:  contains US grown BCI cotton