<ul> <li>A Zoom Air unit in the forefoot offers responsive cushioning. Every step helps create energy return to help drive you forward. It combines with a foam midsole for a firm, yet smooth and stable feeling as your foot hits the ground.</li> <li>Data from hundreds of runners helped inform the crash pad placement at the heel. It helps provide extra cushioning for heel-to-toe transitions, supporting runners that tend to overpronate. That info was also used to put cooling exactly where you need it on the upper.</li> <li>The durable rubber sole is built for mileage. Grooves in the forefoot to create flexibility, and vertical grooves down the side help create stability.</li> <li>Mesh is engineered for durability.</li> <li>Laces cinch down for a secure feel.</li> <li>A softer and more durable lining around the heel and ankle helps keep socks from bunching up when you run.</li> <li>Cushy tongue provides helps pad the laces.</li> <li>Molded heel securely hugs your foot.</li> </ul>