After many prototypes and testing, adidas has created a running shoe that is all about incredible energy return. The Ultraboost 21 sneakers feature adidas LEP, a new Torsion 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 have also crafted from Primeblue high-performance recycled materials that are made with Parley Ocean Plastic. Your new running staple.