I have purchased 2 sets of these boots and niether one has made it a year before the soles cracked across the shoe at the ball of the foot. I work in a large factory 8+ hours, 6 days a week, averaging about 30+ miles a day with no unusual wear factors (welding, chemicals, etc.). The boots were comfortable out of the box, did not require a lengthy break-in period, were lightweight, and warm but the poor sole quality is forcing me to consider another product. As most boots don't really become comfortable until they get well worn in I hate that I have to start the process over with a new pair so often just when they felt really good.