11 mm heel in MONTAGNA compound with new version Vibram tread design constructed according to the latest technical experiences of the Vibram Testers. The excellent resistance to wear, the grip on slippery and uneven terrain together with the special self-cleaning design, make Vibram backpacking the ideal product for repairs to footwear used for the most demanding trekking. In spite of its strictly technicalsports vocation, this heel can also be used for therepair /construction of casual sports-type footwear.