Fabric & details4.5 oz./yd², 60/40 combed ring-spun cotton/polyester, 30 singles Black Solid/ White and White Solid/ Black are 100% combed ring-spun cotton Ribbed collar Self-fabric shoulder-to- shoulder neck tape Front and back yoke Contrast self-fabric sleeve stripes Double needle coverstitch at sleeves and hem Side seams Easy Tear™ label Responsible Manufacturing: Meets OEKO-TEX® Standard 100 requirements.