NIKE Men's Lunaracer 3 Racing Flat Volt/Black/Teal mesh ** UPDATED ** Latest Flywire Construction - Flywire helps provide ultra-lightweight support and comfort for your foot. It gets its strength from thin nylon fibers strategically placed on the upper of the shoe to hold the foot in place, helping to reduce slippage during activity. This allows for a massive reduction in weight because material is used only where its needed for structure. Lightweight and Breathable Mesh Upper - Helps keep your feet cool and gives you a perfect fit with the 360 degree overlays. Lunarlon Cushioning - Ultra-lightweight and springy, offer soft yet responsive shock absorption. Deep Flex Grooves - Located along the outsole for greater flexibility, smoother and efficient ride. Carbon Rubber Outsole  Located in the heel for traction and maximum abrasion resistance.