4.5 oz./yd, 100% ringspun USA cotton . Heather Grey is 90/10 ringspun cotton/polyester . Other Heathers are 50/50 ringspun cotton/polyester . Reactive-dyed for longer lasting color . Pre-washed to minimize shrinkage . Ribbed collar . Taped neck and shoulders . Double needle stitching on sleeves and bottom hem . Overlock stitching on bottom hem . Contrast color three-quarter sleeves . Tear away label . USMCA certified.