FEATURES Insulation Level: Removable Tri-Fit multi-layer inner boot system Waterproof Level: B-Tek™ Dry Waterproof BaseTECHNOLOGY Upper: Stylish leather upper with faux-fur collar D-Ring front lace fastening system Pull loop at the back for ease of entryBase: Premium Rubber base for flexible durability GelFlex™ anti-fatigue midsole for shock absorption and reboundingInsulation: Removable Tri-Fit multi-layer inner boot system featuring: Polywick™ lining for moisture transfer and evaporation outside of fabric Hi-Density Insulation layer Vapourized Aluminum Membrane for energy reflection and heat regulation