This adidas Ultra Boost 2021 comes dressed in a Vivid Red and Core Black color scheme. Essentially an all-Red version of the model, details on the adidas Ultra Boost 2021 include a Primeblue construction on the upper, which is a high-performance recycled material made in part with Parley Ocean Plastic. 50% of the upper is textile, 75% of the textile is Primeblue yarn. The all-Red base is paired up with a matching lace cage, laces, Boost midsole and rubber outsole. Core Black hits are noted on tongue branding, the stripe on the lateral side of the midsole, insoles and part of the outsole.