Textile made from the fibers of the flax plant, Linum usitatissimum. Linen is laborious to manufacture, but the fiber is very absorbent and garments made of linen are valued for their exceptional coolness and freshness in hot weather. Many products are made of linen: aprons, bags, towels (swimming, bath, beach, body and wash towels), napkins, bed linens, tablecloths, runners, chair covers, and men’s and women’s wear.

The word linen is of West Germanic origin and cognate to the Latin name for the flax plant, linum, and the earlier Greek λινόν (linón). This word history has given rise to a number of other terms in English, most notably line, from the use of a linen (flax) thread to determine a straight line. Textiles in a linen weave texture, even when made of cotton, hemp and other non-flax fibers, are also loosely referred to as “linen”.

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 reared in captivity. The shimmering appearance of silk is due to the triangular prism-like structure of the silk fibre, which allows silk cloth to refract incoming light at different angles, thus producing different colors.

Silk is produced by several insects, but generally only the silk of moth caterpillars has been used for textile manufacturing. There has been some research into other types of silk, which differ at the molecular level. Silk is mainly produced by the larvae of insects undergoing complete metamorphosis, but some adult insects such as webspinners also produce silk, and some insects such as raspy crickets produce silk throughout their lives.