4.5 oz./yd² (US) 7.2 oz./L yd (CA), 100% U.S. ring-spun cotton, 30 singles Heather Grey is 90/10 cotton/polyester Heather colors are 65/35 polyester/cotton Graphite Heather is 50/50 cotton/polyester 980 features high stitch density fabric and an EZ Print Finish on solid colors EZ Print is an Enzyme Biotechnology that removes loose cotton surface fibers, creating a smooth and lint-free surface for optimal printing results Modern classic fit Narrow width, rib collar Taped neck and shoulders Side seams 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