The Mammut Alto Guide HS hardshell jacket is an excellent choice for anyone seeking technical versatility. The Alto Guide model is suitable for both day hikes and initial alpine adventures. This jacket is equipped with underarm ventilation with a waterproof zipper, which ensures effective moisture wicking and allows for temperature regulation inside the jacket. This model features a waterproof, two-way YKK Vislon® zipper , known for its durability and resistance to water and moisture. Thanks to the use of the 3-layer Mammut DRYtechnologyPro membrane , the jacket provides breathability , waterproofness , and windproofness , and it is also produced ethically and free of PFCs, as confirmed by the Bluesign certification and care for the natural environment.