100% Waterproof from top to bottom to keep feet warm and dry. Features DuraFresh bio-technology that activates to fight unwanted odors. Lined with Bogs Max-Wick technology to keep your feet dry for a more comfortable, drier foot environment. BLOOM eco-friendly, algae-based EVA footbed that helps clean polluted water habitats. GlacialGrip slip resistant outsole for maximum traction on wintery surfaces. Comfort rated to -40°F/-40°C