I am on a concrete floor for 9 hours a day. We have to wear closed toe shoes and for 5 weeks I tried every pair of expensive sneakers I have. The metatarsalgia was unbearable! Bought expensive inserts and everything else you can imagine. I ordered these and my feet haven't hurt - AT ALL- since the first day. Just ordered a second pair. I don't have to bother with any type of "orthopedic" inserts or anything else to put on foot or in shoe -of any kind. I just slip these on and walk. I do not sit from 9am to 6pm and I have NO FOOT PAIN!! I can not recommend these highly enough!!!!