Roomy toe box for natural movement. With Altra’s signature FootShape fit,you get our roomiest toe box with plenty of room to help your toes move freely, and space through the midfoot. Durable and sticky outsole for fierce trail grip. Vibram Megagrip is a high-performance sticky rubber that offers unparalleled grip on both wet and dry surfaces, rugged longevity, and optimal ground adaptability. Stay protected and clean. GaiterTrap, our unique hook-and-loop tab,allows for easy strapless gaiter attachment without fasteners, bungees, or bindings. Trail debris in your shoes? No thanks!