This is a lightweight, inflatable cushioned rehabilitation boot. It can be used during the recovery period for injuries such as ankle and Achilles tendon injuries. The regular retail price in Japan is 75,000 yen. - Color: Gray - Adjustment: Three cushions can be inflated with a dial and pump. - Design Features: Lightweight and durable design I was prescribed this by a doctor to use during the recovery period after suffering an Achilles tendon rupture. I used it for about two months, and it was essential for protecting my ankle during recovery. The boot is in excellent, like-new condition. There are a few minor scratches, but otherwise, it is perfect. It comes with a replacement foam pad for the sole (unused) and a cover for use when going out (unused). Thank you for looking.