Personalized 1st Birthday Baby Infant Romper. Help your child celebrate their birthday in a special way. 1st Birthday Baby Infant Romper - White, features a cute infant with a number 1 balloon. 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)