The Batman and Superman Fleece Onesie Footie Pajamas with Capes are adult sized (yes, made for grown-ups!) and each one features the appropriate satin superhero shield on the chest. They feature a half-zip front, detachable button-on cape, unisex sizing and feet that zip off. Both are available to purchase at either Amazon (Batman / Superman) or Superherostuff (Batman / Superman).
images via Amazon