Personalized Music Rock On Infant Romper. Music rock On text with a happy dancing rock is a humorous music design. Fun gifts for back to school,marching band, birthdays, holidays and graduation. 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)