Personalized Birthday Girl Comic Book Infant Romper. Pow! Wow! It's the Birthday Girl! Fun comic book style birthday gift for your favorite superhero 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)