This breathable insulation jacket (352g M/L) is made for mountaineering with a mid to high-intensity level. It works great for trail running, ski touring and all kinds of outdoor activities where breathability and warmth when moving is needed. Norrona uses a light nylon stretch as the face fabric because it provides good breathability and wind protection. They use Polartec® Alpha® insulation because they believe it is the world-leading breathable insulation and does not need a lining on the inside. In the hood, part of the sleeve and sides they use Polartec® Power Grid fleece because of its stretch, warmth to weight and durability. The face fabric is a 20D+30D x 20D stretch 55% recycled nylon/ 37% nylon/ 8% polyurethane fabric (62 g/m2). The Polartec® Alpha® insulation is a 100% recycled polyester (95 g/m2). The Polartec® Power Grid fleece is a 85% recycled polyester/ 15% elastane fabric (166 g/m2) fabric. This mid layer has a technical fit. Norrona - Falketind Alpha90 Insulating Jacket Men caviar