Refers to the weight of all down filled in a down jacket; The amount of down filling is an index to measure down quality, which refers to the weight of all down filled in a down jacket. Generally, the filling amount of outdoor down jackets is about 250-450g according to different goals.

The filling structure of down determines the warmth and lightness of down jacket. Down is not easily bound by fiberboard, so when it is surrounded by fabric, it will form a small space with solid box structure and double-layer clip structure, which is what we often call down filling structure.

The smaller the structural space of down jacket, the more down is filled, or the more evenly down is distributed. However, various structures have certain advantages and disadvantages, so different structures are suitable for down jackets with different wearing styles.