Cute, gently used hard tail pants. No flaws - worn by same person. 100% Cupro What is Cupro? Materials are generally separated into three basic categories: plant-based like cotton, synthetic like polyester, or animal-derived like silk. Cupro is a curious mix of all three types, made from a combination of recycled plant-based fibres, treated with chemicals, and in the end, resembling silk. Like other rayon-type fabrics, cupro is a popular semi-synthetic option and sing to the touch.