I wear these not so attractive classic crocs for two reasons Herniated and Buldging disc in my lower back which gives me sciatica in both my hips.  My very fist pair of these shoes i had been in a lot of pain. I could hardly step up on my one front step of my house.  The day i received my very first pair i put them right on and just did the typical walking inside my house.  I kid you not within 2-3 hours of just doing that all pain was gone. For the past 3 years (new pair every year)  theye all that i put on my feet.  No, it does not cure back issues and yes you will have issues but for me I have never had that kind of pain since wearing them.  I would not put such an unattractive shoe on my feet if this wasn't true.  Pain overpowers "looks"  and i will continue to buy these classic crocs for the rest of my life.