First off, these gaiters should be advertised for more uses by OR. I have worn these gaiters all summer training for several mountain races in Alaska. Mount Marathon, known as the worlds toughest 5k, up and down 3,000' in 3.2 miles, cliffs, sharp rock scrambles, and an entire decent through shale. This course destroys gear, plain and simple. These gaiters survived numerous training runs and the race. I also wore them in the Alyeska Cirque Series Race, 5.9 miles 3,900' of gain and loss, and they performed flawlessly. So far this summer, I have worn these gaiters on almost 90,000' of vert, in training, running and races, and they have held up perfectly. I cant imagine a more abusive environment and use than i have put these gaiters through, I usually ruin at least one pair of "trail" gaiters per summer, and yet, these are still without flaw. I very rarely write reviews, because i expect products to do what they are advertised to do. However, these gaiters have simply gone well beyond my expectations, and have become one of my favorite pieces of gear, I am here to leave this comment and get 2 more pairs, to stockpile. Do yourself a favor, and buy these, you wont be disappointed, and you WILL buy another pair.