KEEN Men's Durand Polar Hiking Boot 100% Leather/Synthetic Made in the USA or Imported Rubber sole Shaft measures approximately 7.5" from arch STAY WARM: The Durand Polar boots feature KEEN's lightweight charcoal bamboo insulation and a thermal heat-shield footbed that'll keep your feet warm up to -40F/-40C STAY DRY: KEEN's waterproof, breathable membrane keeps your feet dry, making these boots ideal for outdoor activities in the snow and slush COMFORTABLE: These boots feature a PU (polyurethane) foam midsole for resilient cushioning and a removable, metatomical PU footbed for extra support and ease of cleaning BREATHABLE: The mesh lining lets your feet breathe throughout the day so they can stay healthy and dry AMERICAN BUILT: The Durand Polar is assembled in Portland, Oregon, using the finest materials from around the world