Pocket fuzz is a term used to describe the small pieces of LINT that accumulate in pockets. LINT is a type of fabric debris made up of tiny fibers that are shed from clothing and other fabrics. It is usually composed of fibers from natural materials such as cotton, wool, and linen, but can also be made up of synthetic fibers such as polyester. Pocket fuzz is created when these fibers accumulate in pockets, often due to friction between the pocket and the fabric.