BaffinA(R) Mountain Leather Winter Boots represent the peak of cold-weather ruggedness. Full-grain leather uppers and an Arctic Rubber shell provide durable protection, while a multi-layer system keeps you warm while wicking away moisture. B-Tek Heat hollow-fiber insulation and DiamondNet insulation hold heat, while Thermaplush wicks away sweat. Plus, a vaporized aluminum membrane reflects heat. In addition, Hydromax moisture management technology helps draw moisture away from your foot and funnel it out of the boot. It all comes together to create a premium-grade winter boot that's ready for anything winter throws your way. Tall, full-grain leather upper Gusseted tongue and nylon locking snow collar to protect from the elements D-Ring front lace fastening system for secure comfort Pull loop at the back for ease of entry Removable, multi-layer inner boot system Thermaplush soft, next-to-foot wicking layer for warmth Form-fitting, B-Tek Foam lining for comfort B-Tek Heat lightweight, insulation for high-loft breathability Vaporized Aluminum Membrane for energy reflection and heat regulation Polywood polyester wool blend for breathable warmth Hydromax layering for improved moisture management DiamondNet insulation for wind-resistant protection Arctic Rubber shell to provide lightweight flexibility, cold-resistance, and resilience Synthetic, rubber midsole