Pop Olang Spike BootsOLANG MEMBRANE The Olang membrane is one of the first and most used Olang's technologys available in several models of both winter and trekking outdoor collections. The material of the membrane makes it water + abrasion resistant and breathable, bringing out comfort and lightness. OC SYSTEM The system features stainless steel studs and a framework created with a special, flexible polyurethane that is durable even at the most extreme temperatures. OC