First of all, theses shoe are absolutely true to size. I wear an 8.5 and i ordered an 8.5 and they fit like a glove, barefoot as well as with socks on. I don't use them for running, just as everyday sneakers but I walk and bike a lot and for that they are perfect. The upper material lets the air circulate very well (therefore, I would not recommend wearing these shoes in cold weather without extra socks). The support for feet and especially the arch is great. I used to be wearing Nike's T-lite shoes, like, 365 days a year and they had been my absolute favorite, Until now. Now they have to share first place with those NBs.