This skirt is a windproof and water-repellent additional insulating layer for activities such as ski mountaineering and hiking. Its Durastretch and ripstop nylon outer fabrics are durable enough for alpine use and have a DWR (water resistant) finish. Salewa combine wool with polyester fibers, enhanced by thermoreactive reactive minerals that recycle infrared energy back into the body to stimulate blood and oxygen flow, which benefits performance and regeneration. This will keep you warm longer. The responsive Sesvenna TirolWool® skirt is truly an ideal extra layer for colder conditions. The side zip opening ensures quick stretching and the flat belt has a practical fastening on the side buttons. It packs in its own pocket when you're not using it.