WK400 (Men) Seren Strap This helps reduce the pressure

This helps reduce the pressure under the ball of the foot

The half Speedboard® provides lightweight energy return

Polyurethane (PU) midsole/thermo urethane (TPU) outsole highly resistant to hydrolysis and microbial attack

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Another stunner from Bueno

WK400 (Men) Seren Strap This helps reduce the pressure*GT STAFF OWNED ITEM* The WK400 is a revolution in walking shoes. Made with Keen's patent pending KEEN. CURVE technology, the constant curve of the outsole is designed to make walking feel more like rolling (think rocker soles, but even more rockered). This helps reduce the pressure under the ball of the foot, among other benefits. The lightweight mesh uppers are reinforced with TPU for added durability, while the mesh lining is great for