Material: Upper: Navic Fit System™ Delivers A Natural Midfoot Lock Down Outdry™ Breathable Waterproof Protection。 Seamless Mesh Construction With Custom Metal Hardware Provides Exceptional Fit And Support Midsole: Fluidframe Multidensity Underfoot Support Techlite ™ Delivers Responsive Cushioning And Stability, Without Sacrificing Comfort Outsole: Omni-Grip™ Non-Marking Traction Rubber Trail Difficulty : ★★★★★