Very comfortable right out of the box. I wore these for 4 days while backpacking (roughly 20-25 miles). The boots were very comfortable until the last mile hiking down the mountain. My heel started to rub a little. No blisters but it was only the last mile. I do like the boots and plan to wear them on my next trip. I don't think you'll be disappointed. They stayed waterproof in a good 5 hour down pour. Traction was great even on wet rock. The extra padded foot bed was nice with a 50 lb pack on.
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