At the core of every great idea is a spark of inspiration. That spark? The feeling of effortless running. The idea? Make it happen every time you hit the pavement. From there, adidas Ultraboost running shoes were born. Their responsive Boost cushioning returns energy endlessly over the miles, and a sock-like adidas Primeknit upper provides breathability and support where you need it. Lace in and let this great idea inspire one of your own. Get out and run. This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. 50% of the upper is textile, 75% of the textile is Primeblue yarn. No virgin polyester.