4.5 oz./yd², 100% combed ring-spun cotton, 30 singles; Heather is 90/10 combed ring-spun cotton/polyester ; Granite Heather is 60/40 combed ring-spun 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; This product meets the following Sustainable Style subcategory:Socially Conscious Manufacturing: This product was made in a facility that is WRAP certified