Great insurance policy for your expensive mountaineering pants.
I love these gaiters because they have saved my mountaineering pants from crampon punctures/shredding. The quality is great and they feel like they will last forever. Once you strap them on, they are solid and don't shift around on your boots or legs. The back panel is stretchy, and definitely thin compared to the rest of the fabric on the gaiters. On really cold days, I can feel a difference in warmth between my shins and my calves.