I'd have to agree with you +Matthew Barnden
, while it's kind of a cool idea, I wouldn't call it practical. I don't see how these would work great as slippers seeing as slippers are typically used to keep your feet warm, I'm not seeing how wrapping your foot loosely in felt is going to accomplish that, personally. Also, it seems to me that by simply looking at the shape of it and playing around with it a little bit, anybody could make these at home themselves... looks like a good weekend craft for the kids in the wintertime or something. Let them paint and decorate them too while they're at it.