The Koven Plus Down Jacket is a 700 fill down jacket with fully sealed seams and the Cloudburst Stretch fabric that gives amazing breathability without giving up protection against the elements. This level of down fill traps a lot of heat, so this jacket is best reserved for people that are exposed to extreme temperatures and need the same protection that expedition mountaineers are using. So if 'extreme' is more like a small ski hill in Michigan, maybe look for a different jacket.