I have this pair of sandals. Loved wearing them this summer, they are soooo comfortable! I am a Certified Nurse Assistant and am on my feet 12 1/2 hrs. a day at the hospital. I couldn't do it without my anti-gravity tennis shoes. If you are on your feet a lot or have foot, knee or back pain give the anti-gravity shoes a try. They're like walking on a really thick foam pad. Discovered the tennis shoes last April and have since bought two more pairs and two pairs of the sandals. Several of my co-workers have bought them because of me telling them about them.