The Mammut Broad Peak Jacket boasts 850 fill power, which sounds impressive. As I learned the hard way fill power is a quality of the down not a quantity. This jacket has so little "850" down in it it's hard to detect. The jacket feels like a liner at best. Such a high price for so minimal warmth just does't seem like a good value. I returned it, and ordered the Montane Anti-Freeze which has a 750 fill power but more of it. So far I am very impressed with the jacket and the company. They put extra attention into details that many other equally priced companies don't.
This review was written in the old system and had content requirements that are different than reviews written today.