If you're looking for a shoe that provides the perfect blend of style and performance, then look no further than the Adidas UltraBoost 21 'Black Silver Metallic'. This sneaker is equipped with everything you need to take your run to the next level, including a full-length Boost midsole for unbeatable cushioning and responsiveness. The addition of Solar Yellow lettering on the heel counter adds a pop of color that is sure to turn heads. The adidas UltraBoost 21 ‘Black Silver Metallic’ adds subtle neon accents to an otherwise neutral colorway of the brand’s flagship runner. ‘ULTRABOOST’ is printed in Solar Yellow lettering across the molded heel counter, adding rearfoot stability to a black and grey knit upper that incorporates Primeblue — recycled high-performance materials including Parley Ocean Plastic. Responsive cushioning arrives via a full-length Boost midsole, featuring an exaggerated heel curve that allows for the addition of more Boost capsules.