UPPER: Innovative UA SpeedForm? technology delivers zero distraction while running / Dyneema®, the world?s strongest fiber, woven into the upper for the ultimate in durable flexibility / Seamless asymmetric zonal com¬pression slingshots your feet from heal to toe quicker than ever before / Padded tongue constructed with soft sandwich mesh materials to increase comfort and fit. MIDSOLE: Two-piece Charged Cushioning system pairs a soft/plush layer of foam on top of a layer of dense/ harder foam for the ul..