Anytime a tough boot made for harsh conditions is mandatory, the Denali Pack Boot with the moldable removable liner is the obvious choice. Our proprietary liner traps body heat to create a custom fit that secures the foot in place. Warmth is also trapped inside the durable PU shell which insulates much better that rubber. Slip Resistant Outsole Cold Insulation Fuel Oil Resistant Outsole Water Resistant Upper Water Resistant Leather