AS a vocal recording artist, I'm on my feet a lot. When I first heard of these inserts I was very skeptical because I had tried others that looked just like it. But I read the reviews and saw that they had a 90 day money back guarantee. I really thought I would have to send them back but oh WOW! Just within a week I could tell a difference in my Plantar Fasciitis going away! And it was severe. I don't know how they do it but after about 3 weeks I had no more pain or any issues at all. I really recommend these inserts and tell everyone about them. I also ordered a second pair and accidentally ordered the men's size. They were so good and sent me another pair shipped out in 24 hours!