Out of 6 pairs of boots that I have bought for cold weather, for my husband, this is the ONLY one that keeps his feet warm for longer than 20 minutes, even in the snow and in below freezing temperatures! He wore them this winter to play/exercise our dogs, and with lots of snow on the ground, this was the answer he'd been searching for. He even wears them in the house, as they are super comfy. The only suggestion to the manufacturer is to add grips/traction to the sole.