I purchased this on Amazon. The size was too big, and I missed the return window. I used it twice in a class after that. It's almost new. The price was around 4,000 yen. I believe it's synthetic leather, but it fits the foot very well. The sole is sturdy, and I don't think there's any feeling of instability. This is my personal opinion after trying it twice. It's suitable for Tai Chi beginners. There was no original box, so it will be shipped in an envelope.