Wool yarn is a type of yarn made from the fleece of sheep. It is known for its warmth, softness, and elasticity, making it a popular choice for knitting and crocheting. Wool fibers can absorb moisture, which helps regulate temperature and keeps the wearer comfortable. There are various types of wool yarn, including merino, sheep wool, and alpaca wool. Each type has unique properties, such as softness and durability. Wool yarn is often used to create garments like sweaters, scarves, and hats, as well as home items like blankets and rugs.