Arc'teryx mixed and matched to craft a puffy jacket with all the benefits of real down and synthetic filling. The arms, hem, and collar of the Cerium are stuffed with Coreloft insulation, which retains heat even when wet. But in the jacket's center, you'll find 850-fill goose down, which lofts up to keep most important areas of the body warm like no synthetic can. [$350; arcteryx.com]