The generously tailored fit, softness and light weight feel of the Mammut Mens Comfort Low Gore-Tex Surround, creates a completely new running sensation. All-round ventilation is thanks to the newly developed GORE-TEXÂ® SURROUNDÂ® 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 ConceptÂ®; 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 gripexâ„¢, which features multi-directional lugs and two different rubber hardnesses, offers grip on any terrain.