The PrimaLoft Active insulation provides breathable warmth, allowing you to work up a sweat and know you won't freeze on the cool down. The four way stretch ripstop nylon is lightweight, making it easy to hike, ski, and enjoy activities in cold climates with ease. Worn alone or as a midlayer, it's made for a range of activities and intensities. The Main fabric and lining are made of 100% recycled materials.