Silk is a natural protein fibre, some forms of which can be woven into textiles. The best-known type of silk is obtained from cocoons made by the larvae of the mulberry silkworm Bombyx mori reared in captivity (sericulture).
I will not tell you the whole story because I'm still learning about these precious caterpillars.
You can click HERE for more details.
But believe me, it's exciting to lie on natural, wild silk!!!!!