This classic winter boot combines a rugged, 900-denier double-weave nylon upper and a lightweight, recyclable synthetic rubber base for long-wearing durability and comfort. The lightweight EVA compound midsole is ultra-flexible, highly cold-resistant, and provides ample cushioning underfoot. The 7-layer inner boot system with Thermaplush lining wicks away moisture and delivers superior warmth, while the integrated arch support adds extra protection where you need it most. The premium rubber compound outsole yields maximum traction on cold, hard terrain. Reflective piping increases visibility and safety in low-light conditions. The Baffin Crossfire Boot ensures that feet stay warm in temperatures as low as -40C.