adidas launched the Ultra Boost 4.0 ‘Maroon’ in February 2018. This popular running shoe features a Primeknit upper that not only provides a seamless and comfortable fit but also boasts an attractive look with its red and maroon yarns creating a contrasting blend. The laces follow the same two-tone aesthetic, while the midfoot cage and heel counter stand out in solid maroon and burgundy finishes. Staying true to the classic design of the Ultra Boost line, the shoe incorporates a white Boost midsole and a black Continental Rubber outsole.