Columbia Men's Silcox Slip Omni-Heat Snow Boot 100% synthetic Imported Rubber sole Shaft measures approximately 7.5" from arch Heel measures approximately 1.5" Boot opening measures approximately 14" around 100g OmniHeat insulation and thermal-reflective lining Full-length Techlite midsole OmniGrip traction Waterproof bootie construction Built for rugged conditions, this insulated boot delivers traction across unpredictable terrain.