Shaka Wear Thermal Yarn Count: 18 Singles / 8.9 oz100% USA CottonHeather Grey: 90% USA Cotton / 10% PolyesterCharcoal Grey: 50% USA Cotton / 50% PolyesterShoulder-to-shoulder neck tape1″ double-needle stitched bottom hem1″ neck ribbingRibbed wrist cuffsForward-thrusted shoulder seam for comfortable neck fitWoven neck and side-seam labels.