Active mobility is front and center with the stretch construction in the shell, lining, and insulation of this nylon/spandex reversible jacket that's built for high exertion in cool to cold conditions. Plus, its breathability helps to regulate your temperature while active to prevent overheating. 89% nylon/11% spandex shell | 92% nylon/8% spandex lining StormRepel DWR Pro Wind Resistant Breathable Four-way Stretch Reversible 16oz weight