The adidas UltraBoost 4.0 “Black Multicolor” is a popular colorway for the fourth iteration of the famous running shoe. The eye-catching edition of the UltraBoost features a black Primeknit upper with a rainbow of multicolor threads intertwined throughout the stripe-textured weave. The cage, which is usually hard plastic, is constructed in a less rigid synthetic and mesh material in solid black, while the heel counter contrasts in bright white to match the full-length Boost midsole. Metallic silver branding on the heel counter adds the final touch. The adidas UltraBoost 4.0 “Black Multicolor” released on January 1, 2019.