Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity.
Silk is * Soft *Lightweight *Smooth * A good insulator
It is typically used in quality clothing, bedding, upholstery and medical applicatons.