Personalized Trombone Rocks Infant Romper. Cute Trombone Rocks Infant Romper - White has a cool butterfly logo for the trombonist in band, jazz band and orchestral groups. Get matching trombone gifts for your music section. 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)