Innovative UA SpeedForm® construction molds to the foot for a precision fit, eliminating all distraction. Upper?. EVA foam midsole for shock absorption, cushioning & comfort. ¾ length Pebax® plate is ultra-strong, ultra-lightweight & delivers flexible support where you need it. Drop-in shark skin plate in heel & forefoot for greater traction & durability. 6-pin track spike construction gives you perfect traction to reach & maintain top speeds.