Personalized Super Trex 4th Birthday Toddler Full Zip Hooded Jacket. Rawr! A Trex superhero wearing a birthday hat is surrounded by a colorful burst of confetti. Cool 4th birthday gift for your four 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.