I have had several different types of these boots purchased almost yearly. Everyone of them kept my feet warm (with wool socks-cold feet always). This pair of boots have done well, they adjust very easily. Earlier versions of my journey with booties did not have any way to loosen or tighten at all. Plus, on these earlier models, size was an issue. I'd order my size only to have it too small. These Baffin Base Camp Booties were wonderful. I ordered a medium based on previous trials, this boot is very roomy and adjusts to one's needs with ease. I may go for the small next time. They are for the most part very warm. However, on the pad of the foot, I would have liked more cushion. I have had my feet feel a little cool. For those with normal and not cold feet all the time, they should be very happy. I will consider ordering these again, depending on a year's wear because they as so accessible and easy to find. I also wish they would consider more feminine colors to add to their line, but then I don't live at a Base Camp. Enjoy.