Waterproof and winter-friendly, this update to the Ugg Boots Womens Yose Fluff Boot Slate features a ballistic nylon shaft for enhanced durability. Offering heavy-duty cold-weather performance in a stylish, versatile silhouette, it's rated to withstand temperatures as low as -32 ͦ C (that's -25.6˚F) and includes an innovative White Spider Rubber sole for enhanced traction in icy conditions. Finished with a fluffy faux fur collar and our ultra-soft UGGplush™ wool blend insole, this cozy boot goes everywhere from city streets to snowy mountain trails.