Keen Women's Terradora Flex Waterproof Hiking Boot Features Contoured Fit follows the contours of your foot for a comfortably snug fit KEEN.BELLOWS FLEX adds an engineered flex zone in the upper for more bend and less wear LuftCore technology embeds a lightweight, air-injected core into higher-density foam for enhanced midsole cushioning Achilles pad in the heel for added comfort Speed hooks for easy lace adjustment Direct-attach, air-injected Luftcell midsole for long-lasting cushioning Removable, resilient foam insole with arch support for long-lasting cushioning Higher-traction, rugged foam outsole for lightweight durability 4mm multi-directional lugs for traction Stability shank delivers lightweight stability