Wool Fabric Types

Wool descriptions can identify an animal, a sheep breed, or the history of a fiber. These are different categories of information. Comparing them is easier when the origin of the fiber is kept separate from the weave or knit used to make the garment and from any claim about softness.

Animal fibers, many forms

Wool is made from animal hair fibers that are processed and spun into yarn. Sheep are the most familiar source, but the wider wool family includes fibers from other animals. Different origins and processing methods create textiles suited to sweaters, suits, socks, outerwear, and household applications rather than one uniform type of cloth.

Wool Fabric Types: Wool's Structure Explains Its Warmth

Crimp and trapped air

A natural waviness called crimp helps wool hold air, contributing to its insulating character. The source also distinguishes wool's protein-based composition from plant fibers such as cotton. These differences help explain why two equally thick fabrics need not provide the same warmth. Fiber type, yarn structure, and the finished fabric all matter when judging a wool garment's intended use.