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The adidas Ultraboost 21 institutes another installment of the Ultraboost with a newer, sleeker, environmentally conscious silhouette. It features Primeblue yarn on the upper which is a high-performance sustainable material made from Parley Ocean Plastic. A thick, full-length black Boost midsole adds height to the adidas shoe, while a Continental rubber outsole rounds out the design. This colorway comes in Triple Black with a monochromatic look, complete with a matching midfoot cage, laces, heel counter, and tongue tag.
