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Sheep wool is the most widely used animal fiber in the textile industry.

Natural Fiber

Wool is a product of the natural process in the life of sheep. At the core of this fiber is keratin, a fibrous and flexible protein that forms the basis not only of wool but also of human hair and nails, as well as other animal fibers.

This protein is responsible for giving wool attributes and benefits that are not found in other textile fibers. Wool is a natural, hygroscopic, biodegradable, self-sustaining, and renewable fiber. It is distinguished by being fire retardant, elastic, resistant to unpleasant odors, non-polluting, and, if necessary, recyclable. Wool is suitable and perfect for all climates throughout the year.

Preferred Fiber

Textile Exchange defines a "preferred material" as "a fiber or raw material that delivers beneficial results and impacts for the climate, nature, and people through a holistic approach, transforming fiber and raw material production systems."

Learn about our Regenerative Livestock Program, where we are driving a positive impact on sheep farming in Uruguay.

Unique Characteristics

IWTO Wool Notes 2024

Elasticity

Due to the wavy structure of its fibers, wool has natural elasticity, allowing wool garments to stretch and then return to their natural shape.

Non-polluting

A fiber derived from the natural behavior of the sheep. Wool is biodegradable both in soil and water.

Hygroscopic

This allows wool to help regulate the body's temperature by drawing moisture away from the skin and allowing it to evaporate.

Fire Retardant

The natural structure of wool fiber makes it inherently flame-resistant: conditions must reach 570-600°C (about 1,382°F) before wool ignites.

Odor-resistant

Thanks to its ability to breathe and control moisture, wool is naturally resistant to odors. Wool garments require fewer scours, as airing them out between uses releases any odors.

Breathability

One of the most useful natural properties of wool is its breathability. Thanks to its hydrophilic core, wool can absorb up to 35% of its own weight in moisture, which is then released as vapor into the air.