Synthetic-and-mesh Rubber sole Carbon Plate - Carbon forefoot plate that gives structure to the curved sole. GUIDESOLE Technology - The curved sole design and stiff forefoot of our GUIDESOLE technology reduce ankle flexion and provide a shock-absorbent landing zone to lessen fatigue of other leg muscles and increase runner efficiency. FlyteFoam Midsole Technology - Our FlyteFoam technology provides exceptional bounce back and responsiveness no matter the distance, utilizing organic super fibers to help reduce packing out that traditionally happens with softer, low density foams. ASICSGRIP Technology - ASICS proprietary outsole rubber provides high grip on various terrain, without compromising durability. WET GRIP Outsole - An outsole made from a special blend of organic and non-organic components, designed to enhance traction even on wet surfaces.