Footwear, Shoes and Boots Design 160X 6 Pro Shoes by Long Zhang The 160X 6.0 Pro is a running shoe developed for marathon races. The shoe weighs 171 grams, which reduces the load carried by runners over long distances. A lightweight carbon plate combines polyimide fibers with eight layers of carbon fiber. A split toe design and a raised arch contour add forefoot flexibility and propulsion, while an inwardly curved sidewall improves stability upon landing. The midsole is made with Xtep Ace technology and foam injection molding, and the outsole uses CPU material. The jacquard upper is breathable and wraps the foot.