The Columbia Heatzone 1000 TurboDown Jacket is touted as the world warmest jacket. That’s quite an ambitious claim considering the myriad of high-end down jackets available from manufacturers like The North FaceMammutRABArc’TeryxMarmot, and more.

Columbia claims that the construction of this jacket is what sets it apart from its competitors. With a 900-fill-power water-resistant goose down outer layer welded to a 100-gram layer of synthetic Omni-Heat insulation on the interior, and further enhanced with an Omni-Heat reflective lining, they may be on to something.

Columbia Heatzone 1000 TurboDown: The world's warmest jacket?

 Instead of traditional stitching of the down baffles—a great source of heat loss—Columbia uses “wave technology.” This eliminates the stitching and incorporates welded baffles that are offset between the layers, eliminating the typical cold spots found on more traditional down parkas.