The Men's BUGABOOT PLUS IV Omni-Heat Boots are a reenergized update of Columbia's cold-weather classic. The durable yet lightweight upper is a waterproof and seam-sealed combination of leather, nylon, and webbing accented with metal hardware. The 200g insulation and thermal-reflective lining retain warmth in sub-zero conditions while the superior midsole cushioning and the high-grip Michelin outsole keeps you comfortable and sure-footed.