100% ringspun cotton, 6.1 oz. Double-needle stitching throughout - seamless rib at neck - shoulder-to-shoulder tape - heather blue has natural shade variations and is 100 percent cotton unique to Beefy colored heathers (ash is 99 percent cotton, 1 percent polyester) - (light steel is 90% cotton, 10% polyester) - (charcoal heather is 60% cotton, 40% polyester). Pocket on Left Chest.