1. Feather and Down Quilts:
Feather and down quilts have duck or goose feathers and down as the quilt filling. Down refers to the down clusters that grow under the feather layers; they don’t have a quill and are very resilient.
Down has a super fine and soft texture and its interlocking structure traps multiple tiny pockets of air between the down filaments. This provides increased loft to feather and down quilts and makes this material one of the lightest and best natural insulators, even though down by itself does not have any heat.
To compare the warmth provided by different feather and down quilts, you need to look at the fill weight. As a rule, the higher the amount of down content in a feather and down quilt, the loftier, and warmer it will be. This means that a 1250g 90/10 percent feather and down quilt will be warmer than an 850g 90/10 percent feather and down quilt.
Also, goose feather and down is considered superior to duck feather and down as geese are more adapted to colder climates and so their feather and down is more suitable to combat colder weather.