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The Fibre. Today wool is still the worldâs leading animal natural fibre: its complex protein structure is responsible for unique characteristics and properties â such as exceptional resilience and elasticity â that synthetic fibres just cannot match.Wool has natural crimpiness and scale patterns that make it easy to spin.he Fibre. Today wool is still the worldâs leading animal natural fibre: its complex protein structure is responsible for unique characteristics and properties â such as exceptional resilience and elasticity â that synthetic fibres just cannot match.
Wool Characteristics. When you are learning to tell one wool from another, consider its crimp, fiber length, and fiber diameter, and look at the types and mix of fibers in the fleece. Crimp. Crimp, which consists of the natural kinks or waves in individual fibers, forms as those fibers grow; it is permanent.ool, Hair and Kemp. The term wool can apply to an entire fleece, but it also refers to a specific type of fiber within a fleece. Wool fibers are relatively fine, and have crimp and elasticity; even coarse wool fibers are much finer than hair fibers. Hair fibers are straighter, smooth, strong, and inelastic.