Personalized Tuba Nut Infant Romper. An acorn nut holding a sousaphone is a humorous musical instrument gift design to tickle the funny bone of low brass musicians in concert, tuba choir and marching band. 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)