Keen Men Winter Boots | eBay。Keen Summit County winter boots offer heavy-duty protection for extreme cold weather environments. These American Built boots feature 400g Keen Warm insulation rated down to -40°F/-40°C and a Keen Dry waterproof breathable membrane to keep feet dry and comfortable. The high-cut design provides excellent ankle support and snow protection, while the thermal heat-shield footbed and dual-compound snow and ice grip outsole ensure stability on slippery surfaces. Constructed with a durable waterproof leather and textile upper, these rugged boots are designed for serious winter hiking, work, or outdoor activities.