Chiffon is a light diaphanous FABRIC of silk, nylon, etc Lightweight, sheer, transparent. Made with very fine, tightly twisted yarns.
The famous product of its fabric is chiffon sari. The tightly twisted yarns could be either in the filling or the warp or both.
It is very strong, despite filmy look. Though Chiffon Saree gives look very well but very difficult to handle chiffon saris when sewing and it is best to baste the pieces over tissue to make it easier. It has slightly bumpy look.
Chiffon sarees are best suited to shirring, draping, gathering,tucking, etc., because it is so limp. If made in a straight sheath style, it should be underlined with very firm fabric. e.g. faille taffeta.