Leather and double-weave 900 denier nylon with reflective piping. Toggle-cinch closure for a comfortable, personalized fit. 7-layer inner boot system with Thermaplush. The Baffin multi-layer inner boot system creates a warm boot that can be used for extreme exertion because body moisture is wicked away and expelled from the boot, keeping the feet dry. Thermaplush is a comfort layer next to the foot that is soft yet durable. This velvety smooth innermost material wicks moisture away from the foot. Flexible Proprietary cold resistant EVA compound midsole and internal arch support system are bonded to a premium rubber compound. Shell and outsole made from lightweight, synthetic recyclable rubber. Temperature rated: -40°F/-40°C.