I recently bought a pair of Red Wing waterproof boots. I do not like them because they make my feet sweat like crazy! One evening I wore them for 3 hours and when I took my boots off the gray socks I was wearing were wet all around the toes and heels. My feet are wet before I get near any water. I sent an email to Red Wing asking what they use for waterproofing. The waterproofing layer is a material called Sympatex. This material is supposed to be very breathable but it's NOT. I found a good read on waterproofing material. This breathability comparison testing was performed by the U.S. Army Soldier Center. The website is www.verber.com/mark/outdoors/gear/breathability.pdf After reading this, I emailed Red Wing again telling them about how these boots make my feet sweat. I also told them I have only had the boots for 30 days and I am very unhappy. They have not replied to this email. Red Wing does not seem to care. Look this over closely and you can see how sympatex compares to others. Don't get ripped off like I did. I paid $150 for boots that are total junk as far as I'm concerned. I have never had any problems with Goretex in the past, so I will be looking for a new pair of boots with Goretex.