The UltraBoost 4.0 silhouette made its debut in December 2018 with a stylish 'Non-Dyed White' colorway. This version boasts a clean and minimalist design, featuring a white one-piece Primeknit upper highlighted with black accents for contrast. To enhance the desaturated aesthetic, the shoe is equipped with a pristine white midfoot cage, heel counter, and Boost midsole, all sitting atop a durable black Continental rubber outsole.