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. []