Excellent heavy-duty gaiters. These fit better over my mountaineering boots than the regular Crocs or the Verglas gaiters (both excellent). However note that these would be too big for regular winter boots, these should be considered strictly for mountaineering boots only. I've only used this a few times so far, but I have not yet managed to make a hold in them with crampons. It will probably happen eventually, but the extended coverage with 1,000 denier cordura on the full inside leg should take more abuse than other gaiters. On my last climbing trip I snagged a crampon at least once (though not badly) on the gaiter and it barely left a mark.