Because your extremities are the first thing to lose warmth, the GUNNISON II OmniHeat black waterproof boot from COLUMBIA utilizes their patented Omni-Heat Thermal Reflective Technology, which reflects your body heat for better warmth while still promoting breathability, to keep you out there for longer in cold conditions. An ultralight Techlite midsole cushions and supports, while the Omni-Grip outsole provides rugged durability and traction on wet, slippery surfaces.