Silk, rayon, cotton, synthetics. Plain weave. Lightweight, sheer, transparent. Made with very fine, tightly twisted yarns. The tightly twisted yarns could be either in the filling or the warp or both. It is very strong, despite filmy look. Wears very well. It is very difficult to handle when sewing and it is best to baste the pieces over tissue to make it easier. It has slightly bumpy look. It is 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. Suitable for all seasons.