Improve your running experience with the Adidas Ultra Boost. The midsole is made from durable, innovative Boost technology, which uses thousands of individual energy capsules to provide springy cushioning to your feet, acting like a built-in trampoline. This cushioning is enhanced by the new Stretchweb outsole. Boost is much more temperature resistant than ordinary midsole material, allowing you to perform at your best in any climate. The flexible, four-way stretch mesh heel works with the tongue to hug the foot, creating an athletic fit and superior performance. The Torsion system “bone” eases your heel strike-to-midfoot stance transition, creating a smoother ride. With a breathable, seamless Primeknit forefoot and an S-curve heel counter to prevent Achilles irritation, these shoes provide outstanding support and energy return to help you get the most out of your run.