Silk fibers are collected from cocoons of the silk worm which is the caterpillar stage of the silk moth Bombyx mori. The silk worms are treated to a luxurious life to produce their cocoons. Their environment is kept at controlled temperatures through their life cycles to insure they will live to produce a cocoon. The worm stage is fed crushed mulberry leaves around the clock, allowing it to multiply its weight 10,000 times within a month.
Each silkworm cocoon is made up of a single fiber that is 600 to 900 meters long. Five to eight strands of the filament that are unwound from a silk worm cocoon are used to create silk thread. The silk thread is then used to create silk fabric. Imagine how many silkworms were breed to produce one silk blouse.