Personalized So Cute Birthday Infant Romper. Cute birthday Infant Romper - White with colorful sprinkles and I'M SO CUTE IT MUST BE MY BIRTHDAY saying. For the birthday boy or girl. 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)