Keep the cold at bay in the Columbia® Bugaboot Plus Omni-Heat™ Michelin® boot. This brand is a member of the Sustainable Apparel Coalition.Omni-Tech™ waterproof membrane ensures breathable, waterproof protection from outside elements. Uppers are a mix of leather, nylon, and webbing. Lace-up closure. Metal lacing hardware. Padded tongue and collar. Omni-Heat™ reflective lining helps lock in warmth, and is rated down to -40°F/-40°C.Textile footbed. Techlit™ shell and midsole provides daylong comfort, cushioning, and energy return. Michelin® WINTER & OUTDOOR COMPOUND outsole delivers grip and anti-slip properties in temperatures down to -22°F/-30°C.