Every stride in these Ultraboost running shoes brings you closer to where you want to be. BOOST delivers incredible energy return and instant comfort while an adidas PRIMEKNIT upper wraps the foot with a supportive fit that you can rely on. The Stretchweb outsole with Continental Rubber flexes naturally and provides superior traction on slick or slanting surfaces. 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.