Swan-s-down meaning

The soft down of a swan.

A soft woolen or wool and silk fabric.

Flannelette.

The soft, fine under-feathers, or down, of the swan, used for trimming clothes, etc.

A soft, thick fabric of wool and silk, rayon, or cotton, used for making baby clothes, etc.

A cotton fabric with a satin weave and a heavy napped finish.

A very soft cotton flannel.