The Nike Shox R4 is the original Nike Shox running model, and sprung on to the scene in 2000. They were constructed with innovative Shox technology, which was inspired by the remarkably springy indoor running track at Harvard. Small high-density PU Foam columns in the heel were designed to absorb impact from heel strike during athletic activities, and "spring back" to add more power to your stride.
Size US 6
Comes with Box