Personalized Little Brother Astronaut Long Sleeve T-Shirt. Little Brother Astronaut is floating out in space and has grabbed on to a bright star. Cute gift for any little astronaut. 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