Fast, rugged and ready for whatever wild comes your way, the updated ACG Mountain Fly 2 is here 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. Ready to beat the crowds? We've also made entry easier, with a semi-gusseted tongue and lace toggle for quick adjustments on the go. Of course, you're going to get dirty out there—that's just part of the fun—but our durable, crag-ready traction (inspired by mountain-bike tyres) helps you stay upright and enjoy the adventure