Personalized Music Rocks Infant Romper. Music Rocks text with three musical rocks holding a trombone, violin and guitar is a humorous gift design for music lovers at birthdays, holidays and back to school. 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)