Q:
Why are some boas more expensive than others?

A:
Generally, the more expensive boas are made from a higher quality skin. They are also usually a bit wider.

Q:
What are boas lined with?

A:
Boas are lined with grosgrain or velvet.

Main Entry: gros�grain
Pronunciation: ‘grO-“grAn
A strong close-woven corded fabric usually of silk or rayon and often with cotton filler.

— Compliments of Merriam-Webster

Q:
Are the boas made from one split skin, or two skins?

A:
They’re made from one skin.