100% cotton. Single jersey construction. Front printed to appear as a fireman uniform. Screen printing is lead free (tested and approved). Very cute one piece body suit. Looks great and feels great. Contains snaps between legs for closure. Metal button brass - Zinc plated. The clothing is unisex, for both girls and boys. An infant bodysuit is a garment designed to be worn by infants much like a t-shirt; they are distinguished from t-shirts by an extension below the waist, with snaps or Velcro that allow it to be closed over the crotch. The purpose of the opening at the crotch is to facilitate access to the wearer's diaper. Red fireman uniform style one piece infant suit.