After many prototypes and testing adidas have created a running shoe that is all about incredible energy return. The Ultraboost 21 sneakers feature adidas LEP, a new Torison System providing a 15% increase in the forefoot bending for a responsive run. 6% more Boost capsules are ready to explore with energy in every step. If that isn't enough they are also crafted from Primeblue high-performance recycled materials that is made with Parley Ocean Plastic. Your new running staple.