Show up for yourself. These adidas Ultraboost 21 running shoes make it easier. Lightweight but without sacrificing an ounce of support, the adidas Primeknit+ upper adapts to the changing shape of your foot as you push forward. Responsive Boost cushioning gives you an energized feeling that reminds you that you can always go one more step, maybe one more block or perhaps another mile. (Throw a few extra songs on your playlist. You never know.) 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.