Cold weather doesn't dampen your day when you're in the weatherproof performance of the Columbia® Gunnison Plus Omni-Heat™ boot. This brand is a member of the Sustainable Apparel Coalition.Omni-Tech™ waterproof membrane seals out water, without sacrificing breathability. 200 g insulation helps lock in warmth. Temperature rated down to -25°F/-32°C. Uppers are a mix of hardy synthetic leather and abrasion-resistant textile. Lace-up closure. Padded tongue and collar. Omni-Heat™ reflective lining. Textile footbed. Techlite™ midsole provides lasting lightweight comfort, cushioning, and energy return. Non-marking Omni-Grip™ rubber outsole.