Keen Ss25 Wk500 Black28 2568 At the heart of the WK500 is KEEN. CURVE technology, a continuous curve from toe to heel that makes walking feel like rolling. Built for comfort and performance, it features a contoured fit, padded tongue and collar and high rebound foam cushioning. The shoe also includes offset lacing to relieve pressure on the foot, while the multi directional lug outsole ensures superior traction on all terrains. WK500 KEEN. CURVE "" Performance mesh upper