Columbia Sportswear Mt. Hood Mittens for Kids: The Columbia Sportswear Mt. Hood Mittens are designed to keep your kid's hands warm with 100% polyester Maximum Thermal Retention Fleece material and knit cuffs that help insulate and keep the snow out. These mittens will keep you toasty warm in cold weather conditions but are not waterproof. For waterproof mittens in a variety of Columbia colors that match jackets and hats, check out the Chippewa mitten!