Parka also known as loft layer, puffy. This is your biggest, baddest, protection from the cold. It should feel like you are wearing half of a sleeping bag. It can be synthetic or down but should have ample insulation… 600 to 800 fill down or around 200g of synthetic insulation.\r\n\r\nThis is your outermost layer. At rest breaks on the mountain it helps trap your body heat. It also keeps you warm when hanging around camp. \r\n