Practicality that oozes innovation. Nike ACG returns with a low top iteration of the Mountain Fly Low. This one arrives in a GORE-TEX waterproof layer, while a unique lace system keeps things innovative. ACG branding coats the tongue and insole with a GORE-TEX branded loop panel on the heel. What's more, an exaggerated REACT midsole unit delivers enhanced energy return, while a gum stick-inspired outsole delivers ultimate traction - you'll be ready to achieve your personal best. DD2861-200, Textile & Synthetic Upper/Synthetic Sole.