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 glacial-smoothed granite and up root-twisted trails, we've reinforced every step with an extended toe cap and mountain-tough rubber sidewalls. Don't worry about pushing your hardest either-the breathable upper helps keep you from overheating, while letting you air out quickly when wet. For extra comfort and support, there's a foam midsole and lightweight plate that runs from the ball of your foot to the heel. Of course, you're gonna get dirty out there-that's just part of the fun-but our crag-ready traction (inspired by mountain biking tires) is redesigned to help improve durability and keep you upright and enjoying the adventure.