Most of the materials in these shoes began to deteriorate after only a few days of light walking on level sand and paved paths. I didn't even have the chance to do trail running in them. One would assume that "Swiss Engineered" meant high quality, but this is certainly not the case. These are the second pair of On Clouds I bought. The others also deteriorated within a couple of weeks. I was hoping it was a one off, but it was not. Very disappointed.

Bought these in person in store off of a recommendation from an employee. They felt great and the employee raved about them. Really wanted to like them, but the quality isn't there. Only been to the trail twice in these and the top is already tearing apart. My other cheap pair of trail shoes lasted me over a year and a half with heavy use. Don't think they will last. Hopefully it's just my pair and not all of them.

These shoes were great for the first month. I do some light running and wear them to work some as I’m on my feet throughout the day. After a month they lost a lot of their support and the inside lining was disintegrating. I continued to wear them and telling myself it was ok but they just really start to fail me. 6 months in and the shoes feel completely dead and the toe box on one has fallen apart completely. My wife got Ultras the same day I bought these and she runs a lot more than I do and her shoes still look new and are in great shape. Bummed that $140 shoe didn’t last hold up.