I had tree pairs of them. First I ruin after tree weeks. I made only aproximately 200 km on a muddy terrain. I was disappointed with them. Then I bought the second one. These were good - I made 700 km with them, almost on muddy and rocky terrain. On a wet rock they are very sleppery. So I finally decited to take the third one, but once again I was completely disappointed, namely outeer mesh is very tearing and the sole got worn out in only two months. So I said good bye to La sportiva. I was so stupin. All my friend bought only one pair of them, then ther change the manufacterer, I bought three of them, but now I will do the same as they are...