Personalized Superhero 3rd Birthday Toddler Full Zip Hooded Jacket. Happy 3rd birthday! Celebrate your toddler's third b-day with this cute I'm 3 superhero design. Happy Birthday three-year-old! 7.5 oz., 60/40 cotton/polyester. Jersey-lined double-needle hemmed hood. Pouch pockets for all their treasures. Coverstitched shoulders and armholes. Coverstitched rib waistband and cuffs.