Men's Borealis Boot is a snowshoe compatible winter boot from Baffin. Outer shell in Thermoplastic Polyurethane (TPU) and outer sole in Polar Rubber that provides maximum grip.\n\nUpper:Mid-height, specially formulated Thermoplastic Polyurethane (TPU) shellFront-lace fastening systemPull loop at the back for ease of entryBase:Dual-density midsole with LiteGrip™ Blend outsole for lightweight cushioning and gripPolar Rubber™ outsole for maximized grip and longevity of boot at cold temperaturesB-Tek™ Scent-Free next-to-foot lining for keeping odours at bayExtended rubber tread to grip snow and iceInsulation:Removable Active-Fit Multi-layer inner boot system, with body-heat mouldable technology providing personalized performance and fit featuring:Thermawick™ comfortable, hi-wick next-to-foot lining material for greater breathability and improved thermal regulationForm-fitting B-Tek™ Foam lining for comfortB-Tek™ Lite proprietary aero-insulation blend that allows the inner boot to achieve greater thermal regulation while using less materialB-Tek™ Heat lightweight, 4-channel hollow-fibre insulation for high-loft breathability in a broad range of temperaturesPolyNylon™ blend used as an outer layer for lightweight and breathable liner durability Baffin Men's Borealis Boot Black | Buy Baffin Men's Borealis Boot Black here | Outnorth