Can anyone help identify the name or be able to find some through ebay or amazon.ca of these shoe soles? Vid?

Hi there. I am looking for shoe bottoms or inserts like the ones this spiderman cosplayer is wearing or similar ones. The problem is, I'm having a hard time identifying what they are called or even where to find them. If someone could provide me with a name for what these shoe soles are that would be GREAT! I do cosplay and I have a spidey suit but trouble is I don't have any soles for the feet part of the costume, it's just fabric and if I actually want to be able to "walk around" in the costume without wearing out the fabric like a cheap suit (the costume wasn't cheap) I need shoe soles like this guy is wearing or close to so I can actually walk around in the costume without any worries. I'm not sure what they're called so again if someone could help me out that would be GREAT! I don't know where this guy found them but the soles he's wearing or sole slip ons are exactly what I'm looking for: something to just quickly insert my feet into that covers just the bottom of the feet so the feet are protected and the arches don't fall and the bottom of the costume doesn't fall apart after one use walking around outside.

Here's is the video where spiderman makes his appearance:

http://www.youtube.com/watch?v=SQ71AVFVFdU

And here's what time he shows up in the video with the camera zoomed in one the shoe soles:: 0:47

Thanks a lot guys! I don't know what category this fits in but I just need some help with this.