The adidas UltraBoost 21 Primeblue 'Non Dyed' is a perfect fusion of optimal performance and eco-friendly materials. Crafted with a focus on providing a snug fit that conforms to the natural shape of the foot, the upper of this shoe is made using undyed Primeknit fabric, which not only reduces waste but also incorporates recycled Parley Ocean Plastic and zero virgin polyester. The design maintains a minimalist and clean look, thanks to its supportive heel counter and midfoot cage. Additionally, the shoe features a full-length Boost midsole for exceptional responsiveness and an energy-boosting experience. To amplify the return of energy, adidas has integrated their LEP Torsion System into the midsole, resulting in an impressive level of cushioning and energy transfer.