4.5 oz./yd² (US) 7.5 oz./L yd (CA), 100% U.S. ring-spun cotton, 30 singles Sport Grey is 90/10 cotton/polyester Heather Dark Grey is 65/35 polyester/cotton Made with our soft ring spun cotton and cotton blends, Softstyle's double pique fabric is breathable and ideal for embroidery Modern classic fit Narrow 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