This is a very light and highly comfortable fitted shoe.  You practically fIf you are a runner who is searching for a lighter running shoe, give it a go. Strongly recommend to wear this shoe around for a few days to allow the foot to adapt to the flatter bottom.  This is a "minimalist" shoe, the newer concept that lighter thinned-sole shoes provides better mileage and running economy.  After testing it for a a while, I agree that this does make a difference.  BUT, to switch to a minimalist concept your feet will require conditioning.  So, to wear this right before say a 15K race would cause adjustment issues to include muscle cramping and pain.

Great shoe..recommend it.