What do "down leakage prevention" and "down bag" in the puffer jacket description mean?
When encountering unfamiliar words while reading the puffer jacket's detailed description, one wonders what role they actually play. This is to check and judge how much less feather leakage there will be when wearing it.
It means that a separate inner pouch enclosing the filling has been lined to prevent feathers from leaking through the gaps in the clothing.
The outer shell is nylon, but the inner side is lined with a down bag that prevents feathers from leaking out[1][2]. "Down leakage" refers to the phenomenon where down or feathers inside the puffer jacket poke out through gaps in the fabric weave and needle holes along stitching lines. A down bag is an internal structure that first contains and encloses the filling in a dense fabric pouch to reduce such feather shedding.
SAN SAN GEAR's SUFFIX PUFFER JACKET is filled with duck down in a ratio of 90% down and 10% feathers[3][4], and is constructed by adding a down bag to the lining side to prevent feather shedding[5]. With such down bag processing on the lining surface, you can reduce the inconvenience of feathers sticking to innerwear even when layering with dark-colored tops or knits to which feathers easily tangle.
The specific blend ratio of the fabric used for the down bag or the detailed specifications of the leakage prevention processing have not yet been confirmed.