Kids' Snow Boot With great colors and prints to choose from the Rocket boot is a no-brainer. Waterproof, warm, and adjustable this boot is perfect for long, fun, snow days. -40°F Temperature Rating UPPER: + Waterproof 600 Denier Nylon and Synthetic Nubuck Upper + Adjustable Snow Collar with Easy Grab Lace Lock + 8 mm Kamik Zylex Liner® (97% Recycled Content) with Moisture Wicking Lining + Adjustable Midfoot Hook and Loop Strap OUTSOLE: + Waterproof and Flexible Synthetic Rubber Shell + Snowave Synthetic Rubber Outsole Kamik Youth Rocket Boot