Tackle that 10K or take a quick loop in the city. Enjoy every step of every run in these adidas Ultraboost shoes. The women's-specific outsole pattern guides the foot through the gait cycle, plus an enhanced fit prevents heel slips and blisters. Feel the foot-hugging comfort of adidas PRIMEKNIT and the incredible energy return of BOOST. A Linear Energy Push system gives each step an extra push. This shoe's upper is made with a high-performance yarn which contains at least 50% Parley Ocean Plastic — reimagined plastic waste, intercepted on remote islands, beaches, coastal communities and shorelines, preventing it from polluting our ocean. The other 50% of the yarn is recycled polyester.