Built for the runner who seeks support and cushioning. Synthetic leather and breathable open-mesh upper. CMEVA midsole with heel and forefoot GEL® Cushioning Systems, extended DuoMax® medial post provides static stability and shores up the midfoot, DuoTruss System(TM) two density Trusstic System(TM) links the rearfoot and forefoot to maintain midfoot support. I.G.S.(TM) (Impact Guidance System) directs the foot from heel-to-toe allowing more natural gait. Lateral rearfoot flex grooves addsrearfoot shock attenuation at initial impact. Wt. 10.5 oz.