The adidas Ultraboost 21 features an upgraded Torsion System, increased Boost capsules, and is made with 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. No virgin polyester.

• Sock-like fit
• Lace closure
• adidas Primeknit+ upper
• Textile lining
• Supportive heel counter
• Boost midsole