Personalized 1st Birthday Express Infant Romper. Colorful choo choo train. Car number 1 is filled with balloons and gifts. Smoke stack says ALL ABOARD THE BIRTHDAY EXPRESS Infant Romper - White for a 1st birthday. Meet your new favorite outfit! Keep dressing simple with this one piece, lap shoulder t-romper. Super soft and perfect for baby's sensitive skin. 5.5 oz. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40; Heather is 90/10 combed ringspun cotton/polyester)