The adidas Ultra Boost 2021 is constructed using what adidas is calling Primeblue, 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 upper gets done in white throughout the majority of the shoe with a Solar Yellow stripe running from the side panels all the way across the toe. a clear lace cage with black three stripes branding, more Solar Yellow on the heel counter, pink accents, and a full-length Boost midsole in white finish things off.