This is the Vibram Montagna Block, the time-tested and proven sole, the pinnacle of the building of the Vibram brand. With its wide outer lugs and world-recognized Montagna star lug design, you can be sure of your traction and braking on steep inclines and rocky terrain. Made exclusively for Wesco with Vibram Fire compound, the Montagna Block is made to withstand the extreme temperatures found in wildland fires. And for those who make sure to maintain their boots, the Montagna Block has a separate sole and heel, making it easy to resole.