Batman Baby Onesie Romper, Black ("Lil Crimefighter" Batman Outfit for Babies) (6-9 Months) 100% Cotton DC Comics Batman baby onesie featuring the classic Batman logo -- perfect for you "Lil Crime Fighter"! Batman onesie style romper is made from 100% cotton and has snap closures. Batman creeper is officially licensed. This Batman baby outfit is perfect for costumes or just a day on the town. Great for anyone looking for Batman baby clothes or any other Batman baby stuff for a newborn Batman fan!