Sole material Rubber Outer material Rubber Women's high-performance running shoes with a smooth, flexible ride FLEXIBLE UPPER: Soft textile upper is stretchy and supportive CAN'T STOP. WON'T STOP: The incredible energy return of adidas BOOST is created by fusing together energy capsules, giving you the power to keep your feet moving HIGH TRACTION: The rubber outsole delivers great grip PARLEY OCEAN PLASTIC: 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.