Gildan 5.3oz Heavy Cotton Short Sleeve T-Shirt - Navy 5000 M Cotton 5.3 oz., pre-shrunk 100% Cotton Double-needle stitched neckline, bottom hem and sleeves Quarter turned 7/8" seamless collar, shoulder-to-shoulder taping Ash is 99% cotton, 1% polyester; Sport Grey is 90% cotton, 10% polyester.