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. This boost material is also durable and temperature-resistant, so these shoes will hold up run after run in any climate. The flexible, four-way stretch mesh heel works with the tongue to hug the foot to create an athletic fit and superior performance. The Torsion system 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.