adidas UltraBOOST 21 First Look and Release Details
In this Article adidas has revealed the latest evolution of its signature UltraBOOST silhouette, updating the running sneaker to utilize the newest performance technology. The key feature of the sneaker is its redesigned torsion system, which includes LEP (“Linear Energy Push”) for makes the shoe more responsive and an updated BOOST midsole for extra energy return and comfort. The BOOST system is the most noticeable feature of the sneaker, with an exaggerated heel curve allowing 6% more BOOST to be used on the UltraBOOST 21. Another standout feature is the PRIMEKNIT+ upper, which comes wi...