5 oz./yd² (US) 8.1 oz./L yd (CA) 100% USA premium cotton preshrunk, 23 singles Athletic Grey is 90/10 cotton/polyester Heather colors are 50/50 cotton/polyester Standard fit Taped shoulder to shoulder Double-needle sleeve and bottom hem Tear away label USMCA Certified This product meets the following Sustainable Style subcategories:Sustainable Manufacturing: This product meets the OEKO-TEX Standard 100Socially Conscious Manufacturing: This product was made in a facility that holds a SMETA audit certification