Personalized 4th Birthday T-Rex Toddler Full Zip Hooded Jacket. A grinning T-Rex dinosaur holds a birthday cupcake and wears a party hat to celebrate the four year old's 4th birthday! 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.