If it works for you then great...When I was involved in wilderness survival training long time ago, we the instructors forbid people to wear jeans and cotton during winter survival trips, since we never carried tents or sleeping bags, dressing properly for the weather was a top priority. One of our rules was, no cotton during winter.... Cotton has a nasty way of freezing solid after it gets wet, it feels like wearing a piece of stiff cardboard, it takes forever to dry, damp cotton will chill your entire body and core temperature really fast, I know that from personal experience...I am not trying to tell you what to do, I am just trying to explain some of the negatives of jeans and cotton during winter. I don't even own jeans anymore, I find them restrictive, heavy, and uncomfortable in any weather, I just don't like them.