First launched in 2015, adidas Ultra Boost is adidas' strongest running shoe, whether from the shape design to the revolutionary sole transformation, Ultra Boost has redefined people's original understanding of running shoes. Launched in 2017, adidas Ultra Boost 4.0 features a new three-dimensional texture detail and a more sock feel. Unlike the 3.0 version, the translucent Cage on both sides has also returned to a solid color design, and some shoes also replace the original TPU setting with a material similar to ballistic nylon, and also add a matte heel bracket to echo. At the same time, the upper also adds openwork ventilation holes to make wearing more comfortable.