Keep. On. Going. A collaboration between adidas Running and genre-defying star Pharrell Williams, these Ultraboost 20 Shoes blend the designer\'s unmistakable vision with high-performance running technology. They have a stretchy adidas Primeknit upper that adapts to the changing shape of your foot as you put in the miles. Responsive Boost cushioning keeps your stride energised so you can stay the course. This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. adidas Pharrell Williams Ultra Boost 20 Features: Pharrell Williams Ultraboost 20 Shoes Lace closure adidas Primeknit textile upper Boost midsole Rubber outsole Primeblue ?????