Lightweight Breathable Mesh With Seamless No Sew Upper With Internal Reinforcement Creates Great Fit And SupportBarefit Internal Liner For A Sock Like FeelMidsole Layers Of Z Bound+, Zva And A Dedicated Heel Crash Pad Combined With High Traction Carbon Rubber Create A Smooth Transition Through You Entire StrideProgressive Forward Roll Geometry Allows For An Easy Transition From Mid Foot To Toe Off With Minimal Effort