Personalized Mechanical Engineering Genius Infant Romper. Mechanical engineering genius text with a line of gears is a unique gift design with attitude for engineers and students at back to school, birthdays, holiday 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)