What is fleece?

Fleece is a type of fabric made from wool or synthetic fibers that are often used for clothing and blankets. The wool used to make fleece comes from animals such as sheep and is typically sheared off in one piece from the animal's skin. The wool is then processed and spun into yarn, which is then woven or knit into a soft, fuzzy fabric with a texture similar to that of sheep's wool. 
Fleece is valued for its softness, warmth, and lightweight feel, and is popular for use in outdoor clothing and blankets.