The Speed ??300 IGNITE are designed with reduced cushioning to create lightweight running shoes. They feature a seamless upper for extreme comfort, a state-of-the-art engineered propulsion zone that gives you more speed and the exclusive IGNITE foam on the midsole, along with exceptional responsiveness and energy return that allow you to go faster. Reflective panels for visibility. Lace-up closure for a comfortable fit. Heel pull tab for easy on and off. Molded OrthoLite® sockliner for optimal fit and comfort. Grippy outsole with injection-blown EverTrack + rubber for durability in high wear areas. Heel-to-toe transition: 8mm. Weight: 8.2 ounces (size 9).