Let’s have a look into some home supplies that are filled with down: down quilt, down jacket.
If you go around in a shopping mall and have a look at those down quilts or down jackets, you’ll find out that they are all design as a cloth that has many squares on it,no matter the brand or price.
So, why are all these down products has squares on it?
The answer is: Because down has fluidity!
The down is the softest white fluff on the duck or goose, usually it is on the place that is closest to their skin.
If you don’t consider the thin tentacles on the periphery of the down, it is almost like a sphere. The higher the quality of down, the more it looks like a sphere.
The structural feature of the down itself plus its extreme lightness, the fluidity becomes the most important feature of down.
The propose of stitching the down products and make many squares on them is to constraint the fluidity of down.
Fluidity is the cornerstone of designing and producing all kind of down products.