I bought these to wear to a sleigh ride in freezing temps.  We had to stand around in the snow for a few hours, and everyone's feet were frozen.  I didn't feel the cold at all.  I use these for snow shoveling also.  They are kind of clunky to walk in so I wouldn't want to wear them all day or for long distance walks.  But they are great for being outside in cold weather for a few hours.