The Kids’ Rugged II Boot will protect your child’s feet in severe cold with the 5mm neoprene waterproof bootie insulation backed with a fleece lining. This lining adds extra insulation to keep cold out for kids that want to stay outside playing in the snow all day. Warm Fleece Lining Lightweight EVA Midsole for All Day Comfort and Support bioDEWIX™ Anti-Microbial Footbed Insert Topcover with NZYM™ for Odor Control and Moisture Management Extended Rubber Coverage 100% Waterproof, 100% MUCKPROOF 5mm Neoprene Bootie for Comfort and Performance Rugged outsole with grip