Compressed gas injection molds produce 22% lighter sole units.
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. Triple BlackErgonomic throat designs reduce lace pressure on tendons
