Personalized Environmental Genius Infant Romper. Environmental Engineering, the profession for intelligent people with the letter E in engineering wearing a hard hat is a humorous engineering gift design for college students and engineers 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)