The lightweight Adizero Boston 7 shoes are great for fast runs. At 8.6 ounces, you might not expect these shoes to offer much in the way of support, but they do feature the brand's Stabilizing Torsion System. The air mesh upper keeps your feet cool even as you push yourself to new limits. Rely on the Microfit system to keep your feet secure, and the responsive midsole cushioning helps energize every step.