These lunar glide sneakers bring a level of technology to running I have not previously experienced. I own 2 Lunar Glide 8. One 9.5 (my actual size). The other a 10 because I wanted to use an insole. The 9.5 fits like glove. Best running shoe I have ever owned. The 10 a little too large, uncomfortable with insole. The lunar glide 9 in 9.5 fits perfect AND has added feature of re-inforced heel box. No more pronation or supination.