My favorite piece is this Shawl Coat from 1970:
It consists of two rectangles, each 54 x 25" that are folded crossways at shoulder and joined in center back for approximately 75" (this causes the cocoon effect).
I can't wait to try this out with some of my own fabric!
I see it also working in silk, for a super drapey effect.
If you're in Portland, the show is up until July 30.