The Ultraboost 21 is an innovative shoe born from adidas’ extensive research and represents the perfect balance between weight, cushioning and reactivity.
Its sock-like upper is made of Primeknit+ for a snug yet flexible fit. But the novelty is in the impressive energy return and reactivity offered by the Torsion system and BOOST midsole capsules, which will never cease to amaze you.
This product is made with Primeblue, an elastic material woven with Parley Ocean Plastic yarn that comes from plastic waste obtained from coastal areas. It does not include virgin polyester.