The KEEN Men's Circadia Mid Polar Boot is an insulated boot for keeping feet warm and protected in the cold outdoors. The boot is made with a thermal heat shield that captures warmth, so whether you're chopping Wood for the fireplace or going sledding with the kids your feet will be kept warm, so no need to worry about your toes turning into icicles. The boot is made with a KEEN DRY waterproof, and breathable membrane meaning that if you're facing some rain or Snow your feet won't get soaking wet keeping them dry and comfortable, and air will circulate through the boot to reduce overheating when things start to heat up, and with the natural odor resistant properties you'll be able to wear the boot all day without getting your feet all stinky. Features of the keen Men's Circadia Mid Polar Boot Thermal heat shield insole captures warmth 200g of Keen. warm Insulation rated to -25°F/-32°C Speed-lace webbing system with top collar hooks for comfortably snug Fit Quick-dry lining for active use Eco anti-odor for natural odor control Higher-traction TPR Outsole Non-marking TPR Outsole 5mm Multi-directional lugs for traction Heel-capture system for added stability Environmentally preferred premium leather from LWG-certified tannery PFC-free, durable water repellent Keen.dry waterproof, breathable membrane Notch in back for achilles comfort Original Fit-iconic keen Fit with generous space across forefoot for toes to spread out Luftcore Technology embeds a lightweight, air-injected core into Higher-Density foam for enhanced Midsole cushioning Waterproof leather and Performance mesh Upper