The original Vibram  heel. Vibram´s Montagna Block heel was created for use on outdoor footwear. Design Lugs are angled to provide substantial edging capabilities on both ascent and descent. The center medallion of carrarmato lugs provide maximum traction. Compound The exclusive Vibram compound guarantees maximum traction on wet/dry surfaces and various terrain.This compound maintains its physical properties in extreme temperatures. All compounds are developed and chosen by considering the sole design and end use of the intended footwear. The Vibram® heel. Use with Style #100 Full Sole. Dimensions: 7/8 Iron