I was introduced to the world of barefoot running after trying and failing a C25K program. Couldn't break 5 minutes. I read an article about the benefits of barefoot running, gave it a shot sock-footed on my parents treadmill, and my 5 minutes became 25 minutes easily! Now  that we have our own place, I do not have access to an at-home treadmill, and running sock-footed at the gym is frowned upon. These have gotten me back to running again with no leg pain! My arches seem to be coming back even! Thanks Fila (and Vibram ;-) ) for making such a GREAT product!