Made to help heal sprained ankles, knee issues, drop foot, nerve damage from the knee down, any conditions where you can’t bend your knee or ankle because it needs to heal this device does that, brand new, I put it on one time and tried to walk around in it and I just couldn’t do it so I ended up getting a cast, which was even more uncomfortable, but I had to get used to it because I couldn’t take it off and I refused to wear that boot it just seemed too big and bulky for me but some people medically do need it. It’s very effective in healing the issues that it was made to rectify. Usually cost close to $100 unless you get one through insurance I’m selling mine for $25.