Lace-up and fly to a new personal best in the Nike Zoom Fly 4. This is a shoe made for propulsion. It combines lightweight and durable Nike React foam with an internal carbon fiber plate for flexibility to give you a smooth, responsive stride. You will feel snug and secure in this Nike Zoom Fly 4. The upper conforms to your foot for a sock-like feel and is made with lightweight mesh for a softer and more breathable shoe. Four pieces of webbing work with the laces wrapping around your midfoot for a tight, secure feel. There is also Nike Flyknit around the collar to make the shoe easier to put on and take off. The Nike Zoom Fly 4 has the comfort and durability of a training shoe combined with the propulsive feel of a racing shoe to make every day feel fast.