It's not winter yet, but I predict these boots will keep my feet warm. This is my first pair of Crocs, so the wide toe box has taken some getting used to, but the boots are comfortable and easy to walk in. The fake-fur top can be rolled up or down, and the buckle across the back makes the fit adjustable. Unlike some people who reviewed this shoe, I did not need to buy a larger size than I usually wear for them to fit with standard socks. I live in the South so I don't need heavy wool socks -- if I did, I probably would have needed to order a size larger. I think these boots will be good in rain, too. Looking forward to wearing them this winter!