Personalized Hoot Owl I'm Going to be a Big Brother T-Shirt. It's a delightful way for kids to express their excitement about having a new brother or sister. The playful imagery and heartwarming message make it a standout choice for any big brother in the making. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.