Our most breathable and lightweight wind jacket. This packable wind jacket is made for lightweight mountaineering but works excellent for other mid to high-intensity activities ranging from trail running to ski touring. We use our aero60 fabric because it offers the perfect sweet spot between breathability packability and windproofness for lightweight durability. The lightweight recycled 22D x 27D ripstop nylon has a slightly open weave construction and an air permeability of around 60 Mbar/l/m2/s for good moisture vapor transportation during aerobic activities.