Personalized Biological Engineer Leaf Infant Romper. Biological Engineer on a black leaf is a unique engineering design. Fun gifts for bioengineers and college students at back to school, 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)