Pure comfort! The generously tailored fit, softness and light weight create a completely new running sensation. All-round ventilation thanks to the newly developed GORE-TEX® SURROUND® technology. Additional ventilation is provided by an air-permeable layer between the wedge and insole, which also offers comfortable cushioning. The lightweight hiking boot also features board lasting; the patented Rolling Concept®; a Hybrid Shell that provides shape and stability; an IP EVA wedge with excellent cushioning and integrated arch support; and a protective liquid rubber toe cap. With its Sonar technology, the new Sonar comfort sole by gripex™, which features multi-directional lugs and two different rubber hardnesses, offers grip on any terrain. gripex Outsole Technology Rolling Concept Hybrid Shell Liquid Rubber Protection 3-D Textile Sonar Technology Board lasted Rolling Concept The patented Mammut sole concept with customized support and cushioning to support natural foot roll, and thus prevent fatigue (danger of twisting). Sonar Technology The unique tread construction, designed to ensure maximum transfer of braking and impetus force, is inspired by the concentric pattern created sonar waves. This guarantees high lateral edge stability for steep traverses, a secure grip on slippery surfaces thanks to the flexible ribs and an integrated longitudinal arch support. The flexible ribs integrated in the wedge and the patented Rolling Concept ensure a rounded rolling movement combined with ergonomic support and cushioning.