CONNECTS TO UA MAPMYRUN™: tracks & analyzes your running metrics to help make you a better runner. UA Storm technology treated upper repels water without sacrificing breathability. External TPU heel wrap provides lightweight structure & support for added lockdown. Molded EVA sockliner provides added comfort, resiliency & cushioning for high-mileage performance. Carbon rubber in heel & toe-off for added traction & durability & blown rubber forefoot for energy return.