No. Down or polyester duvets need pockets to spread the filling evenly. But our silk duvets are different. They use silk floss filling. This silk floss is in the form of many thin sheets that are laid one on top of another. The silk floss is fixed to the outer cover of the duvet. It's tacked at around 8-inch intervals. Because of this, the silk floss stays firmly in its place. It won't clump together. This makes the comforter look nice when it's laid over you, ensuring a beautifully draped comforter that outperforms down, feather, and polyester alternatives.