Prototype after prototype. Innovation after innovation. Testing after testing. Meet us in the hot pursuit of 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
Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm)
Stretchweb outsole with Continental™ Rubber
Product Code: FZ2559