Columbia Minx Shorty III Winter Boots Worn one season, less than 10 times! 200 g insulation keeps your feet plenty warm; boots are temperature-rated down to -25°F (-32°C) Textile uppers with faux fur collars Omni-Tech™ waterproof/breathable, seam-sealed bootie membranes ensure weather protection Omni-Heat™ thermal reflective lining reflects and retains body warmth Omni-Grip™ nonmarking rubber outsoles provide solid traction