I bought several, so I haven't used it much. It's thick, so it's very warm! It can be used in 3 ways: attached to a baby carrier for carrying and back carrying, and also on a stroller, so you can use it in a variety of situations when you go out. Both baby and mom are warm ♪ The lower part of the "Cold Protection Use" is pocket-shaped, so it completely wraps and warms the baby's feet. If you put your hands in the hand muff, mom's hands will also be warm ♪