When you are selecting silk duvets, the casing outside the silk filling should be taken into consideration, of course.
As everyone knows, there is almost an endless choice for duvet casings, cotton, silk, polyester etc. Traditionally, however, the Chinese use a very course threaded casing for their silk filled comforters. This was to allow body heat to escape through the casing and help in heat regulation. Today, largely due to modern manufacturing techniques a much tighter and finer casing can be woven which has similar properties, that is silk casing. The choice of silk casing is largely down to individual preference.
With similar protective functions as silk duvet covers, silk casing has been valued by more and more people. Know this piece of guide, you will sure by the most ideal silk duvet.