FEATURES of the Bogs Women s Snowday II Cozy Slipper Plush fleece linings lend warmth and comfort Bogs Max-Wick technology evaporates sweat to keep your feet dry DuraFresh natural biotechnology activates to fight odors by inhibiting the growth of odor-causing bacteria Bloom algae-based EVA footbeds add cushion Bloom is a plant-based performance-driven foam made with algae biomass; algae is renewable feedstock sourced from lakes and ponds at high risk of algal bloom Machine washable