Fast, rugged and ready for whatever wild comes your way. The updated ACG Mountain Fly 2 is built to take you to the top. Over glacier-smoothed granite and root-twisted trails, every step is reinforced with an extended toe cap and tough rubber sidewalls. Don't worry about pushing your limits either: The breathable upper helps keep you from overheating and airs out quickly when wet. For extra comfort and support, there's a foam midsole and lightweight plate running from the ball of your foot to the heel. To finish it off, crag-like traction (inspired by mountain bike tires) helps improve durability so you can continue enjoying the adventure. Benefits For extra comfort and support, a foam midsole and lightweight plate run from the ball of your foot to the heel. Crag-ready traction inspired by mountain bike tires is redesigned to help improve durability. Entry is easy with a semi-gusseted tongue, plus a lace toggle make for quick adjustments on the go. Nike ACG Ready to conquer or escape the urban landscape, Nike All Conditions Gear outfits you in modern wear that tackles the elements. Wind- and waterproof fabrics and breathable technologies keep you covered, while next-level design equips you with versatile storage and style options.