Personalized Biological Engineering Heart Infant Romper. Biological engineering text in a heart with pimples is a humorous design for bioengineers. Fun gift ideas for birthdays, holidays, graduation and Valentine's Day. 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)