100% cotton (RS Sport Grey: 90% cotton/10% polyester; Heather: 50% cotton/50% polyester). Made with soft ring-spun cotton and a cotton blend. Softstyle Midweight features a high stitch density fabric for a smooth printing surface. The soft ring-spun fabric feels pleasant against the skin. No overstitching, reduced width, ribbed collar. Taped neck and shoulders for greater comfort and durability. Slim fit, side stitching.