Collaborating with environmental organization Parley, adidas’ Solar Boost ‘Core Black’ sneaker took the brand’s design capabilities to the next level. This Solar Boost is built with a foot-hugging Techfit upper and a stretch mesh forefoot, supported by recycled plastic fibers injected into the midfoot. The sneaker’s full-length Boost midsole uses Solar Propulsion Rail technology to increase stability and flexibility of the Achilles.