A thick down jacket basically has the same functions and area of use as a thinner down jacket. In contrast, it is a more insulating garment, and often has a material that is windproof and water-repellent. They are intended to provide maximum heat, while keeping the lowest possible weight and package volume. If you are a real freezer, jackets like Oslo Urban Down Unisex Parka or Expedition Down Unisex Parka can be a good choice.