TrekSta Men's Evolution Technical Trail Running Shoe 100% Mesh Rubber sole Built with unparalleled support and sensitivity, the Evolutions will change your whole experience on the trail. Once on your foot you'll have a hard time telling where the shoe ends and you begin. NestFIT system cradles your feet, accounting for every contour as it follows the natural flow and design of the foot. Upper, insole, midsole, and outsole work together like never before HyperGrip/IceLock sole provides traction in any condition Lightweight, variable-density Zero Gravity EVA midsole Variable-density EVA insole supportsthe arch, cushions key strike zones, and strengthens your stride