The new unique KEEN WK400 men's trekking and sports shoes bring a provocative approach to walking. The curved sole with KEEN.CURVE technology creates a constant sense of forward momentum. What you may perceive as a strange sensation while standing, you will understand immediately as soon as you start walking. It's as if you're rolling in the WK400. KEEN high-energy midsole enhances comfort with every step. Athletic Fit secures the foot while giving your toes plenty of room. Multi-layer outsole provides stability and traction on a variety of surfaces.