The Ultraboost 21 is a cutting-edge sneaker 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.
- Excellent response and stability
- Maximum support
- Snug and flexible design
- Weight: 12 oz
- Midsole drop: 10 mm (heel: 30.5 mm / forefoot: 20.5 mm)
- Textile and synthetics upper
- Lacing system
- Fabric lining
- Boost sole, Rubber sole
- Padded ankle
- TPU molded eyelets
- CORE BLACK
Praised by some of the best athletes of the moment, the shoe with BOOST™ suits every kind of runner to give more cushioning and a higher energy return. Composed of hundreds of little balls made of polyurethane, the Ultraboost 21 sneakers made with BOOST™ gives you back most of the energy used on every hit, which is the same as a more explosive and effortless takeoff.
adidas TORSION® system
adidas brand incorporates TORSION® technology in its running shapes. The technology presents a stick located in the center of the lower part of the shoe in order to connect the front and the back of the Ultraboost 21. The role of the plate is to cross the strength of the feet from a part to the other and then allow an independent movement, giving more flexibility and stability in any kind of surface.
Primeknit adidas technology upper, made with digital warp-knitted, is especially designed to offer an optimal fit , maintaining the foot into place. These shoes with Primeknit technology are very lightweight, of great flexibility and highly breathable, so that they fit to your foot's shape just like a sock.
The Ultraboost 21 sneakers feature a Continental sole to offer you a great adhesion in all kinds of grounds. The two german brands join to offer you an outsole of rubber that will not only give you a great grip, but will help you conserve the energy to perform to the best in your sporty activities.
Believed by many to be the best running shoe ever, the adidas Ultraboost makes a comeback in an updated version. Six percent more Boost technology capsules and a new Torsion system turn the Ultraboost 21 into the silhouette of the year.