4.2 oz./yd², 52/48 combed ring-spun USA premium cotton/polyester, 36 singlesHeather Black and Heather Grey are 90/10 combed ring-spun USA premium cotton/polyesterRetail fitHeat-set fabricRibbed crewneck collarSelf-fabric back neck tape and shouldersSide seamsDouble-needle sleeves and bottom hemTear away labelUSMCA CertifiedThis 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