Wool

Wool is a natural animal fiber primarily made of keratin, a protein rich in sulfur-containing amino acids. Wool fibers have overlapping scales and a crimped structure, giving elasticity, warmth, and moisture-wicking properties. Wool often contains lanolin, a natural grease that provides water resistance and softness. Common sources include sheep and other animals such as goats, alpacas, llamas, and rabbits.

Wool is the natural fiber obtained by shearing sheep’s fleece; it’s produced worldwide in temperate regions. Major wool-producing countries include Australia (the largest), China, New Zealand, the United Kingdom and Argentina. Fleeces are shorn annually, cleaned, carded and spun into yarn for textiles. Other animal fibers—cashmere and mohair—come from goats and angora rabbits, respectively.

Wool is the dense, curly hair fiber produced by sheep and some other mammals (e.g., goats, alpacas). Composed primarily of the protein keratin and coated with natural oils (lanolin), wool’s crimped structure traps air, providing excellent insulation and moisture-wicking properties. It’s resilient, flame-resistant, and frequently harvested for textiles and clothing due to its warmth, elasticity, and durability.

Wool is an excellent clothing fiber: naturally warm, breathable and moisture-wicking, it helps regulate body temperature, resists odors and remains insulating when damp. It's durable, biodegradable and has inherent flame resistance. Downsides: some people find it itchy or allergenic, it often requires gentler care (hand wash or special cycles) and can be pricier than synthetic alternatives.

No — wool is not cotton. Wool is an animal-based fiber (sheep, goats, etc.) made of protein (keratin), while cotton is a plant-derived cellulose fiber. They have different properties: wool insulates and wicks moisture, cotton is breathable and cool. Garments may be pure wool, pure cotton, or blends; check the fabric label for exact composition and care instructions.

Wool outperforms cotton for warmth, moisture-wicking, odor resistance and thermoregulation; it insulates even when damp and often feels drier. Cotton is softer, more breathable in hot, dry conditions and absorbent, but it retains moisture, dries slowly and can feel cold when wet. Choose wool for cold, active or wet conditions; choose cotton for light, casual wear in hot, low-activity settings and easier washing.