The Keen WK400 M are unique trekking and athletic shoes that bring a provocative approach to walking. The rounded sole with KEEN.CURVE technology creates a constant feeling of forward motion. What you may perceive as a peculiar sensation while standing, you will immediately understand as soon as you take a step. It's like rocking back and forth in your shoes. The KEEN high-energy midsole enhances comfort with every step. Athletic Fit reinforces the foot while providing enough space for the toes. The multi-layered outsole provides stability and traction on various surfaces.