I like these for outdoor walking/running/hiking in the cold. Living in New England, being active in the winter requires various layers. These are pretty warm for a couple of hours on their own. I can go a couple more hours in freezing weather with another thin layer beneath them. My only complaint is that they are super baggy around the ankles. I'm 5'7" and the regular length hit above my ankles and they are still baggy which creates friction points. I may try to alter them; otherwise they are keepers and feel well-constructed if a bit spendy for what they are.