Steely Blue S23-R / Blue Pearl / Core Black Nano X3 Women's Shoes Versatile fitness shoes with a supportive build Believe it or not, there's a training shoe you can actually run in. Meet the women's Reebok Nano X3 training shoes with the all new Lift and Run Chassis system. A dome-shaped heel piece compresses under load when lifting to create a stable platform, then softens when you push off to run. It all rides on award-winning Floatride Energy Foam that gives you lightweight cushioning to make that run the easiest part of the workout. EUC - worn for 3 workouts before I realized I needed a different size. Make me an offer! Size 9.5