Trick-or-treating is a fun family tradition, so why can't Rover get in on the action? He certainly can in this Batman dog Halloween costume. We won't get into the disturbing psychology of a dog who thinks he's a batů Set includes body suit with printed belt and logo and attached cape, and a headpiece with ties. Care: Polypropylene. Hand wash cool, no bleach, line dry. Available in small (neck 11" chest 14"), medium (neck 15" chest 17"), and large (neck 22", chest 20").