The foundation of the model is the Boost cushioning system. Boost was created in collaboration with BASF, the largest chemical brand in the world. The cushioning system is the result of pressing thousands of TPU energy pellets together that store and release energy in every step. Boost provides more energy return than any other foam in the running industry along with retaining its cushioning properties in weather change. Before Boost was introduced to the mainstream market, the technology was quickly proven, as it was worn by adidas athletes to win races and set record-breaking marathon times. adidas gave the Ultra Boost an additional 20% of cushioning to ensure the model performed as well on the track as it did on the streets. The perfect combination of performance and style, the adidas Ultra Boost was designed as a performance running shoe, but the same tech features that make the shoe so appealing to athletes have also positioned the Ultra Boost a serious statement maker.