So I finally gave my luggage a run for their money last week here in Aus. It was a 3 dayer through the Snowy Mountains, however being the middle of summer and bush fire season there was no snow, it was just hot and dusty. The OL30's were amazing. Held up up well to a number of crashes on rocky hills. Not a mark on the bags at all.. I even managed to crush a sturdy aluminum water bottle inside the bag from a crash and the bags still look new! Very happy with these bags so far!