I bought these for racing longer distances (10k-12K-half marathons) where I needed more than a standard racing flat but still wanted a lightweight shoe...these are perfect for that, but surprisingly, they are my new favorite for daily runs as well. Seriously, these are great trainers! So much lighter than my former favorite, the Kinvara.  Note on sizing:  These run a 1/2 size small, I am normally an 8.5 in Saucony but take a 9 in the A5 with thin wool socks