Ultra Boost 21 Black/White

The adidas UltraBoost 21 ‘Core Black’ brings a simple color palette to a high-performance running shoe that blends lightweight comfort with superior energy return. Constructed with recycled Primeblue materials, including Parley Ocean Plastic, the knit upper is further strengthened by a midfoot cage and molded heel counter. The optimized Boost midsole has 6% more Boost capsules than the UltraBoost 20 and uses a new Torsion system called Linear Energy Push to deliver added responsiveness.