Evolved from SCARPA’s classic SL M3, the SL Activ is a very supportive but exceptionally light backpacking boot incorporating SCARPA’s new Activfit technology. Activfit includes the highly cushioned, lightweight, dual-density Biometric PU midsole package, which puts different densities of polyurethane into specific locations to improve both cushioning and precision on the trail. The new more ergonomic upper design is made from Sherpa HS12 leather, and lined with memory foam with moisture wicking and odor control for a custom fit you will appreciate on long trips. A full perimeter rubber rand provides protection, and long-term durability and support in rough terrain.