4.5 oz./yd, 100% combed ringspun cotton, 30 singles. Heather is 90/10 combed ringspun cotton/polyester. Granite Heather & Vintage Smoke are 60/40 combed ringspun cotton/ polyester. White is sewn with 100% cotton thread. Topstitched ribbed v-neck collar. Self-fabric back neck tape. Side seams. Double-needle stitched sleeves and bottom hem. EasyTear label.