As a year round runner in a northern climate, these shoes were a perfect transition from my road running shoes, Merrell mix master. Out of the box I went for a 10 mile trail run without any issues other than a small hot spot on my heel. So comfortable that I didn't even think that they may need some breaking in. A few more runs since then with no issues whatsoever. The grip is fantastic on trail and snow. Fit is perfect with just enough cushioning. My winter running will certainly be warm and dry.