I have seen a lot unusual speakers such as the ones by Metal Sound Design and the Darth Vader and Stormtrooper Speakers, but I have never seen anything like this.
You will note that you can attach them to a television and a laptop, and they look odd no matter what they are near. Unless you have a shoe fetish or something.
These aren’t just any shoes, but the Nike Air Force 1 sneakers with a full range and tweeter loaded into the each shoe, with volume controls, an amplifier.
The controls are in the right shoe, but I don’t see any price on my Source or anything.