Personalized Running Half Marathon Run Long Sleeve T-Shirt. Cute run 13.1 Long Sleeve T-Shirt - Pink for a half marathon runner who loves to stay fit. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL