The Bogs Snowday II Mid insulated boot is so warm yet so cool. This 100% waterproof boot includes a fleece lining for warmth and comfort. The rebound cushioning provides lasting comfort, DuraFresh organic bio-technology activates to fight unwanted odors and Bogs Max-Wick keeps sweat add moisture away. It also includes BioGrip slip-resistant outsole and is comfort rated to 13°F/-25°C