With the adidas BoostTM running shoe, the impact energy of jogging is no longer wasted – it is sent back to the runner.
As soon as the compression from the foot’s impact is released, the foam of the shoe’s midsole springs instantly back into shape. The energy expended in a footfall is thus largely returned to the athlete. This is made possible by a new technology developed by BASF and adidas, which enables athletes to move as if they were on cushioning foam capsules. It is based on InfinergyTM, the world’s first expanded thermoplastic polyurethane (E-TPU). To make it, BASF foams up TPU granules into highly elastic foam beads: 2,500 of these are then formed into a midsole, creating a novel cushioning and shock-absorbing system.