Removable Insole Rubber sole Shaft measures approximately low-top from arch 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. FLUIDRIDE MIDSOLE: ASICS FluidRide midsole provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability