The Ultra Boost 4.0 by adidas was introduced to the market in March 2018. This particular version is characterized by a monochromatic appearance, with a light tan hue known as 'Chalk' covering the entire upper section of the shoe, which includes the breathable Primeknit upper, laces, and heel counter. The midfoot cage, serving both as structural reinforcement and the shoe's eyestay and trademark three-stripe detail, is also designed in a tonal manner. To complete the understated aesthetic, the BOOST midsole and Continental rubber outsole are presented in a complementary white color.