Cotton and other natural fibres based on cellulose can be improved by an enzymatic treatment known as BioPolishing. This treatment gives the fabric a smoother and glossier appearance. The treatment is used to remove 'fuzz' - the tiny strands of fibre that protrude from the surface of yarn. A ball of fuzz is called a 'pill' in the textile trade. After BioPolishing, the fuzz and pilling are reduced. The other benefits of removing fuzz are a softer and smoother handle, and superior colour brightness.