What is the difference between duck down and goose down and velvet?

Duck down:

The down of ducks, processed duck down hair, has a strong ability to keep warm. There is a strong ability to keep warm, used to make down bedding, down clothing, etc., cheaper.

Goose down:

The down of domestic geese is mostly used to keep warm after being filled into certain things, goose down comforter, goose down down apparel and so on. In a variety of warm materials is undeniably the most superior down, all because of its soft structure and can be folded extremely small, but the quality of down is very different, only high-quality down has these advantages. Only the best quality down has these advantages. Strict cleaning, disinfection, and selection processes are carried out before the finished product is produced to ensure that its down products have a stronger heat preservation power than others, and have a good moisture resistance.

Velvet:

It is not the down of a swan, but a fabric. Velvet is the name of the silk fabric with the velvet warp on the surface of the fabric to form a velvet ring or velvet. Also known as Zhang velvet, because it originated in China's Fujian Province, Zhangzhou region and named. The Ming Dynasty has been a large number of production, is one of China's traditional fabrics, flowers, plain two types.