Inov8 Bare-X 180 Running Shoes ZERO Arrow Shoc-Zone - Zero height difference between heel and forefoot mean you can't get closer to the ground with a running shoe. 3D Air Mesh Upper - Made from stretchy material that forms around your foot gifting excellent comfort with a snug fit. Fusion Sole - Blended synthetic Lite Rubber and EVA foam, injection moulded to provide a midsole that is lightweight but protective. Micro-Thin Rubber - Blended with the midsole to give this barefoot trainer great comfort and protection. Weight: 180 grams