Introducing the King MT, made for runners who embrace mud, rocks and burly mountain climbs. This shoe features a Vibram outsole with 6 mm lugs designed for optimal lateral breaking, medial gripping and maximum traction in wet, loose and rocky conditions. Topping this awesome outsole is the Altra Ego™ midsole, a new compound with high responsiveness at a low weight. A flexible, wrap-around StoneGuard™ rock plate adds extra protection underfoot, and the one-directional friction heel lining keeps your foot securely in the shoe. The King MT has the most supportive upper of any Altra with TPU overlays, durable polyester Ripstop fabric and a Foot Lock Strap (that doubles as a lace keeper!) to lock your foot into the shoe on steep ascents and descents.