Personalized Safari 3rd Birthday 3 Year Old T-Shirt. 3rd Birthday T-Shirt - White with safari hat number 3 and lion 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.