Personalized Super T-Rex 2nd Birthday T-Shirt. Rawr! A T-Rex superhero wearing a birthday hat is surrounded by a colorful burst of confetti. Cool 2nd birthday gift for your two year old. Everyone loves our Custom T-Shirts! 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.