Engineered spacer upper features a minimalist design for breathability, durability and lightweight coverage, external TPU heel wrap provides lightweight structure and support for added lockdown, molded EVA sockliner provides extra comfort, flexibility and cushioning for high-mileage performance, responsive UA HOVR™ cushioning reduces impact and returns energy to help you move forward, carbon rubber in the heel and toe increases traction and durability, and foam rubber in the forefoot provides energy return.