Personalized Super Trex 1st Birthday Newborn Layette. Rawr! A Trex superhero wearing a birthday hat is surrounded by a colorful burst of confetti. Cool 1st birthday gift for your one year old. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months