Personalized I'm One Dinosaur Toddler Full Zip Hooded Jacket. I'm One! A grinning dinosaur wearing a birthday hat rips through the shirt to wish the little one year old a happy 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.