TrekSta Evolution 161 GTX Trail Shoe - Men's Nest Fit system cradles your feet, accounting for every contour as it follows the natural flow and design of the foot. Upper, insole, midsole, and outsole come together like never before. Think HyperGrip sole provides superior traction and durability.. Upper shoe features Gore-Tex XCR IceLock/Hypergrip sole provides traction in all conditions. Weight: 13.6 oz/shoe (size 9)