※ I was using these to treat foot pain caused by my child's flat feet. I bought extra, but their flat feet improved, the pain went away, and they are no longer needed, so I am selling them. ※ BMZ CCLP Ashitore 《Authentic》 Black ※ Muscle training effect just by wearing them ※ These are said to be effective for flat feet, heel pain, arch support, knock knees, posture, knee pain, and fatigue.