These shoes can be found for customization on NikeID, Nike's online shoe customizing site. There are numerous options like different colors and materials for the Shox, along with custom tags on them.The Nike Shox OZ technology does a better job of returning the energy transfered to it than the Air Max shoes. The Shox shoes were very cutting edge using a super high density polyurithane hollow foam columns as the shock absorbers in combination with a TPU heel counter to ensure equal distribution of the energy from impact.New, high tech, high durability materials make the leaf spring obsolete and bring about the current form for Nike Shox OZ: four cushioning columns between two resilient plates.