Four months into almost daily wear and very happy with purchase. So far this winter the morning temps for the past 4 weeks have been at the 0/15+ degree mark. Using only a merino wool sock I have worn these boots in cow poop, snow, ice, mud, and ankle deep water. With the goretex lining I have not found the need to break out my Sorrels which I find to clumsy for eveyday work. I'm not trying to represent any insulating properties in this boot just that the goretex lining has worked very well for me and boot has been waterproof. Bear in mind I have cleaned and treated the outside of the boot with silicone waterproofing at least three times this winter already. The leather has held up well and the boot was comfortable from day one. Two thumbs up also for the slip resistant soles.