Cotton material. Very cute one piece body suit. Looks great and feels great. Contains snaps between legs for closure. Front printed to appear as police uniform. 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. Make a great gift. Navy blue police uniform one piece infant suit.