Meet us in the hot pursuit of the pinnacle harmonisation of weight, cushioning and responsiveness in Adidas Men’s Ultraboost 21 Shoes. Say hello to incredible energy return. Sock-like fit Adidas Primeknit+ textile upper Boost midsole Textile lining 10mm midsole drop Continental rubber outsole Lace-up closure Primeblue fabric Adidas lep The new Torsion System provides a 15% increase in forefoot bending stiffness for a more responsive run. Incredible energy return 6% more Boost capsules ready to explode with energy in each step. Primeblue fabric This product is made with Primeblue, a high-performance recycled material.