Personalized 4th Birthday Twins Owl Party Photo Infant Romper. 4th Birthday twins Infant Romper - Light Blue cute party photo tee with colorful owls and balloons and it's our 4th birthday quote. 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)