Personalized Coolest Trombone Teacher Infant Romper. The world's coolest trombone teacher in snow capped text with a snowman playing a trombone is a funny design for teachers at birthdays and holidays. 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)