5.5 oz./yd, 100% cotton jersey. Heather is 90/10 cotton/polyester. Ash is 99/1 combed ringspun cotton/polyester. Ash and White are sewn with 100% cotton thread. Ribbed collar. Shoulder-to-shoulder self-fabric back neck tape. Double needle stitched sleeves and bottom hem. CPSIA compliant tracking label in side seam. EasyTearlabel.