Nike Shox technology is a patented system for reducing the impact of heel strikes while running or playing sports. On the heel of the shoe, a group of hollowed-out tubes made of energy-efficient foam are attached to a Pebax plate (that’s polyether block amide, a lightweight, flexible polymer). When the shoe hits the ground, the columns collapse towards the center, and when the shoe is lifted, the columns spring back. This responsive cushioning absorbs more impact, reducing the risk of injury. Locate your pair in the vast selection of women’s Nike Shox shoes found on eBay.