Dupioni is a style of
silk fabric which is often
woven from two different colors of
thread. This results in a beautiful
sheen, and in fabric that appears to be a different
color when viewed at different angles. The
warp in silk dupioni is a relatively consistent thread, but the
weft is an irregular, rough silk
fiber, which gives the finished fabric a
nubby texture.
Dupioni is usually marked dry clean only, but if you buy fabric to sew with and wash it before you cut any pieces, you will end up with a garment that can be washed in the washing machine. Washing it will make it drape a little better, which I like; dupioni that has only been dry-cleaned is a bit on the stiff side.