Silkworms, being flightless, are totally reliant on highly skilled humans, and are therefore extremely labor-intensive. 1 Kg of silk is produced by 6000 silkworms, after consuming 200 Kg of mulberry leaves. A filament from a silkworm can be over a mile long; although half a mile is more normal. Between 5 and 8 of these filaments are twisted together to make a thread.
Today silk is grown mainly in Asia, with China steadily regaining its traditional major market share by increasing production. The demand for silk has increased steadily over time, despite the inroads made by much cheaper man-made fibers. The fact is that people prefer silk over almost any other fiber when circumstances allow. As prosperity spreads, so does the demand for silk.
Many layers of Long Silk floss are pulled out by hand to the dimensions of the duvet until the right weight is reached to reflect the correct Tog Value. Each layer takes on the appearance of gossamer as it is stretched out. This is why Long Silk cannot bunch up inside the duvet and remains evenly distributed throughout its life. Mulberry Silk Filled Duvet