<ul> <li><strong>Quick Step</strong></li> <li>A large-volume forefoot Zoom Air unit in each shoe returns your energy to help generate explosive bursts of speed.</li> <li><strong>Lightweight Containment</strong></li> <li>The upper is made with synthetic leather and airy ripstop for a sturdy build that won't slow you down.</li> <li><strong>Zip It Up</strong></li> <li>The zippered collar that rings the shoe's shroud spells out a special message with its teeth: "Why Not?"</li> <li>Midfoot plate runs through the shoe for added stability.</li> <li>Herringbone outsole provides ample traction.</li> </ul>