Cupro is a cellulosic fibre that is made from cotton linters. These cotton linters are a by-product of the cotton harvest and consist of fibres that are too small to spin. The manufacturing of cupro requires the use of chemicals, but if produced in the most sustainable way possible, the chemicals are kept in a closed-loop system in order to minimise their environmental harm. Cupro has similar properties to cotton while at the same time being soft and lustrous, which is why it is often used as a vegan alternative to silk.