Personalized 1st Birthday Robot Infant Romper. Happy 1st Birthday! Celebrate your baby's first birthday with this cute robot. Happy birthday 1-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)