Designed for the serious trail runner adventurist and off road athlete seeking a utilitarian product built to perform. They featured lightweight tough synthetic mesh with durable Ecsaine overlays, full length Phylon midsole, heel Air Sole unit and Softlon pod in forefoot for cushioning and protection, tough durable BRS rubber compound on the perimeter for traction and durability and sticky rubber lugs in the center for great traction on wet and hard surfaces