Running shoes with an elevated look. These Ultraboosts are built with hundreds of fused BOOST capsules for incredible energy return. The adidas PRIMEKNIT upper hugs the foot for a supportive feel. A Stretchweb outsole flexes naturally, and Continental Rubber grips on steep and slippery 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.