TrekSta Men's T740-Evolution GTX Trail Running Shoe 100% Synthetic Rubber sole NestFIT system cradles the foot, accounting for every contour as it follows the natural flow and design of the foot Ice Lock / HyperGrip sole provides traction in any condition Triple Density EVA insole supports the arch, cushions key strike zones, and strengthens your stride Waterproof and breathable GORE-TEX membran