Personalized Environmental Engineer Gamer Infant Romper. Environmental Engineer I fight zombies in my spare time is a funny gift design for engineering gamers at birthdays, holidays and graduation. What would this world be like without them? 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)