Judging from the official explanation, Boost is not a shoe, but a sole material. It is a product jointly developed by adidas and the global chemical industry giant BASF Chemical Company of Germany.
It splits thermoplastic polyurethane (TPU) into micro-shaped energy capsules like popcorn, making them extremely resilient. Compared with traditional materials, it has more superior performance and can store and release more running kinetic energy compared with other cushioning technologies.