This review is mostly for the fit as I haven't worn it yet. I had an old pair of the same lightweight MT680 v2 trail runners which I found a little tight for my 4E feet. I usually wear a size 9 but on older trail runners I had to use a 9.5 and they were still a little tight. They are a size 9, fit well and have plenty of room around the toes. I would never run in them or the MT680 as they don't offer enough support. But they are good walking and very light and comfortable. I plan to use them primarily for cycling.