This is a right ankle support made by DAIYA Industry, the type before it became bonbone. I used it for Judo. I purchased it at an orthopedic hospital. I used it to prevent injuries because I had a torn ligament. It feels very secure and gives peace of mind, powerfully holding the ankle from various directions. I've only used it a few times, but it's quite old (the type before bonbone) and it's a used item, so please refrain from purchasing if you are concerned.