Lightweight and ready for the outdoors, the Nike ACG Mountain Fly Low boasts ripstop nylon on the upper with canvas lacing looping around it. What's more, React foam in the midsole offers responsive cushioning for all-day comfort on your outdoor adventures. Sticky rubber coats the Waffle outsole, offering glue-like grip on unpredictable surfaces. DJ4030-001, Textile & Synthetic Upper/Synthetic Sole.