Personalized Coolest Engineer Infant Romper. A snowman wearing a hard hat with text the world's coolest engineer is a humorous engineering design. Fun gifts for college students and engineers for birthdays and the winter 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)