Made from waterproof full-grain leather, the Felton boot is cold-weather rated to -32°C (or -25.6°F) and features waterproof bootie construction, warming insulation, and innovative Vibram® outsoles designed to stay flexible in freezing temps. Adding UGG’s innovative UGGpure™ wool blend for all-day wearability, this rugged silhouette is equally ideal for mountain hikes and city streets.