Inspired By The Mountains And Volcanoes Of Hawaii's Big Island, The Nike Acg Mountain Fly Low 'flash Crimson' Showcases A Fiery Hue Throughout The Ripstop Nylon Upper. Reflective Rope Laces Are Looped Through A Set Of Webbing Straps For A Lockdown Fit, While Pull Tabs At The Tongue And Heel Provide Easy On And Off. Lightweight Cushioning Arrives Via A Nike React Midsole And A Full-length Carbon Fiber Plate Borrowed From Nike's Vaporfly Franchise. Underfoot, A Lugged Gum Rubber Outsole Wraps Up The Forefoot For Reliable Traction On Rough Terrain.