A great direction that On has taken with the Cloudflow shoe. I wear size 12 and these shoes are light for those of us with big feet. The clouds are much more durable than the Cloudsurfer model. I have yet to have any of the clouds wear through like they do on the Cloudsurfer. Two changes I would like to see with the shoe is a little more bounce. I know people complained there was too much bounce on the first Cloudsurfers, but I loved it. The other change is that unlike the Cloudsurfer I do get a lot more rocks stuck in the tread/clouds. They need to work on something like on their trails shoes to keep those road rocks from getting stuck. Other than that I am really in love with these shoes and already on my second pair and will be buying a third once I wear these out.