UltraBoost 21

Prototype after prototype. Innovation after innovation. Testing after testing. The pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return.

• Sock-like fit
• Lace closure
• adidas Primeknit+ upper
• Textile lining
• Supportive heel counter
• Boost midsole
• Weight: 340 g
• Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm)
• Stretchweb outsole with Continental Rubber
• Primeblue
• Imported