Is the gortex label present on the outside of this boot and what insulation is used?
I don't know if they have a Gore-Tex membrane or any kind of membrane waterproofing. They do say waterproof embossed in the leather and I have been very wet and they do not let any water in. They have a tag that says 200 gram. Don't know the insulation material but they are equal or better in warmth to any of my 200 gram winter work boots that are the newest version of thinsulate. I notice now on the features on the website that they are Gore-Tex. They are an awesome boot. Light weight, totally dry even when standing in 3 inches of water. Super comfortable, no break-in needed. No pinching in the tongue. Deep tread on sole. I have had two pair of non insulated Chocorua's and they fit the same and are the most comfortable shoes I own. I size a 10 1/2 D and I always buy Chocorua's in size 11. These are no exception. My opinion is that they run almost 1/2 size small. That is my experience.