A type of silk fabric made from twin cocoons naturally bonded together. The bumps in the fabric, they're really called 'slubs', are the result of this bonding. Dupioni is often woven from two different colors of thread, giving it a shimmering, color-shifting appearance. Sturdy and substantial, it feels almost like taffeta. It's very easy to sew with and holds a crease well. However, it does not stretch at all so make sure your cuts are precise.