It continues to evolve along with technology.

The world's first down jacket was created by Eddie Bauer, the founder of Eddie Bauer. Based on his own experience of suffering from hypothermia while winter fishing, he developed a method in 1936 to seal down, which was used for cold weather protection in Russia, inside the outer garment and then quilt it. He commercialized the down jacket and obtained a patent for it.

Down jackets use soft down, which comes from the breast feathers of waterfowl, and feathers. The ratio of down, which creates an air layer to enhance insulation, to feathers, which restores the compressed air layer, is important. Generally, a ratio of 90% down and 10% feathers is considered optimal for down jackets.

Furthermore, another way to judge the quality of a down jacket is by its fill power, a unit that indicates the loft of the down feathers. The higher the fill power value, the lighter the jacket is and the more air it can hold, and a fill power of 700 or higher can be considered high-quality down.

Until around 1980, down jackets were primarily seen as cold-weather clothing, but in the 80s, Moncler released fashionable down jackets, and in the 90s, down jackets from brands like The North Face became popular on the streets, leading to their recognition as everyday streetwear.

The history of down jackets is also the history of technological advancements. In recent years, Montbell's EX Light Down Jacket, which weighs an average of 150 grams, has become popular, establishing a new genre called "inner down," and further expanding the range of outfits and occasions in which it can be worn.