Adizero Prime X Strung is our first ever Adizero running shoe with a Strung upper. Strung is a textile innovation that transforms athlete data into a dynamic material tuned to the athlete's needs. It makes it possible to map and program different fiber properties thread by thread. With a flexible and a lightweight seamless cocoon feeling around the foot, Strung helps optimise your comfort, and supports you in breaking your personal best on long distance runs. The Strung upper is fused to a Prime X outsole packed with carbon Energyrods and three-layers of Lightstrike PRO for a responsive run.