adidas When it comes to comfort, nothing beats the Ultraboost. While the design got its start on the track, these adidas running shoes have stepped firmly into the style realm with polka dots on the adidas PRIMEKNIT upper. Ride through your day on a responsive BOOST midsole that keeps you confident in every jump, turn and stride.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.