Personalized Mining Eggineer Infant Romper. Eggineers are engineering eggheads and this humorous egghead with a shovel, a handful of rocks, a hard hat and mining eggineer text is a humorous design for mining and geological engineers at 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)