The Under Armour Charged Speed Swift women's running shoes are built insanely light and supportive so nothing will hold you back the second coach blows that whistle. At the heart of their performance is the Charged Cushioning® technology, designed to optimize responsiveness and impact absorption, and the Deluxe Comfort System insole, designed to mould to the feet and maximize comfort. Combining sturdiness and flexibility, their durable rubber outsole contributes to efficient traction and offers increased flexibility in the toe area.