Shop Green Mens adidas Ultraboost 21 Running Shoes – Shoebacca。New in Box. Adidas men\'s Ultraboost 21 Sneakers. Style No. S23873 The Ultraboost 21 is the pinnacle harmonization of weight, cushioning and responsiveness to provide incredible energy return. The adidas Primeknit+ textile upper provides a sock-like fit, with 6% more Boost capsules and a new Torsion System that provides a 15% increase in forefoot bending stiffness. Continental™ Rubber outsole. This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. Content - Textile, rubber Size: Men\'s 6.5