Mammut Sertig II Low GORE-TEX Women's Walking Shoes The Sertig II Low GORE-TEX is a lightweight and robust multi-purpose shoe designed for your active lifestyle. Air Mesh Upper and GORE-TEX Lining Designed to provide lightweight comfort, the Mammut Sertig II Low GORE-TEX Walking Shoes have been constructed using an air mesh upper. The lightweight and highly breathable upper construction allows cool air to flow throughout the upper whilst at the same time allowing hot humid air to escape. To avoid damp feet, and therefore dampened spirits, a GORE-TEX INVISIBLE FIT membrane resides inside the shoe; it integrates with the mesh upper to supply a combination of durable waterproofing and optimised breathability. Sometimes it's hard to stay dry without developing that distracting clammy feeling, but GORE-TEX keeps water on the outside while letting perspiration escape from the inside; keeping sweat to a minimum and you, cool and comfy. By perfectly matching the GORE-TEX mem