The Atlas II Waterproof Insulated Boot is a cute winter boot from See Kai Run. It features Thinsulate insulation and a thermal fleece sockliner to keep little feet warm with a waterproof design that keeps out snow and slush. We also like the wide opening and hook-and-loop straps which make it easy to get our kids' feet in and out of these boots without too much drama. For the best fit See Kai Run recommends ordering one size up.