The only thing I don't like about these boots is that they are so comfortable and perfect that I realized that my summer hiking boots are uncomfortable and need to go. These babies are so lightweight, soft, and warm that I am excited to put them on and never in a hurry to take them off after a long hike. I've been wearing them in snow and mud hiking in southern Utah for the last couple of months and they've held up great. They're perfect in super cold temps and comfortable up to about 45-50°, but in anything warmer than that I have to switch back to those other boots I don't like now. I usually wear a size 10 in most shoes and 10.5 for hiking boots. I ordered these in 10.5 and they're perfect even with thick socks. My feet are average width and they're a bit narrower than other Keen shoes I've worn but still roomy enough. I've been raving about these to anyone who will listen and I wanted to spread the word here too. If you add gaiters they'll be the only snow boots you need!