Designed to provide orthopedic support, comfort, and bunion relief. GUC, only worn a handful of times. I found the bunion relief to be great, but I just do not like my sandals this high, even though they are only 2". They are size 40, which usually converts to an 9, but I am normally 8.5 and was able to wear them. They should be just fine for a size 9, though. please inspect pictures closely if considering buying and feel free to ask any questions 😀