If you haven't heard about these or tried these-you need to! These are what kept my feet from being so tired on Friday. We've sold a lot of these these since we've got them in last summer(that's when I bought mine and just now decided to try them out!). They are rounded on the bottom(people think you'll fall over wearing them) and are supposed to improve posture, strengthen calf and thigh muscles, tone and get rid of cellulite. I know a lot of nurses and factory workers have bought them along with people who just do a lot of walking. It feels like you're walking on a cloud-and I needed that on Friday(no high heels that day!) Check them out for yourself!