Silk is a natural protein fiber, some forms of which can be woven into textiles. Silk has a long history in India. It is known as Resham in eastern and north India, and Pattu in southern parts of India. Silk’s absorbency makes it comfortable to wear in warm weather and while active. Its low conductivity keeps warm air close to the skin during cold weather. Silk has been considered as a luxurious textile since 3630 BC. The various types of silks are printed silks, blended sliks, silk jacquards and many more.
Wool is a textile fibre and is chemically quite distinct from the more dominant textile, cotton, which is mainly cellulose. Because of the crimp, wool fabrics have greater bulk than other textiles, and they hold air, which causes the fabric to retain heat. Wool has a high specific heat coefficient, so it impedes heat transfer in general. The various types of wool fabrics are crepe, double jersey, tartan, tweed, flannel, wool felt etc.