The KD 4 brings a lightweight, low-profile build made of smooth synthetic leather and airy textiles. Its signature wrap-around strap adds containment while forefoot Air Zoom cushioning provides speed, control and bounce. Benefits * Synthetic leather and textile upper is breathable and durable. * Hook-and-loop strap wraps around the midfoot for containment. * Snappy and responsive, Air Zoom cushioning helps provide a quick-off-the-ground sensation. * Rubber outsole gives you excellent grip.