Personalized 1st Birthday Puppy Blue Infant Romper. I'm one! A cute blue puppy dog with a birthday hat and a cupcake with a 1 shaped candle. Happy 1st birthday to the one-year-old! 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)