Think of you. This Ultraboost 21 adidas running shoe lets you do just that. Lightweight without sacrificing an ounce of support, the adidas Primeknit+ upper adapts to the changing shape of your foot with every movement. Dynamic Boost cushioning gives you endless energy feedback to remind you that you can always go further, maybe a block or a mile further. (Add a few songs to your playlist. You never know.) This product is made with Primeblue, a high-performance recycled material made in part from Parley Ocean Plastic. 50% of the upper is textile, 75% of the textile is made of Primeblue fiber. No virgin polyester. Integrated liner.