Responsive cushioning provides an energized and comfortable ride. Energize your stride with the Winflo 12. Built with a Nike Air unit and a thick stack of Cushlon 3.0 foam, it's the perfect combination of enhanced responsiveness and consistent cushioning. Breathable mesh up top and an accommodating fit help you feel locked in and ready to push for that extra mile. Design: The upper is made with an open-hole mesh for optimal breathability Nike(R) widened the toe box, giving you a little more room in the forefoot Accommodating fit In-Shoe Comfort: A higher stack of Cushlon 3.0 foam than previous models gives you more comfort underfoot - It works with a Nike Air unit in the heel to help energize your every stride Durability & Traction: Flex grooves in the outsole offer integrated flexibility and help aid your heel-to-toe stride Additional Details: Weight: Approx. 261g/9.2oz (Women's US 8) Heel-to-toe drop: 9mm