Some models use cupro in both the body and the sleeves, such as this navy Greg jacket with notch lapels and flap pockets. Others are lined in viscose or in a blend of polyester and cupro, and Luca jackets have a minimal viscose lining that keeps them light to wear. So rather than assuming every jacket has a cupro lining, check the composition of the specific model.
In a waistcoat, the lining matters even more. A waistcoat sits against your shirt over a large area and is sometimes worn without a jacket on warm days, so you notice straight away how well its inside breathes. In many classic waistcoats, the back is made of lining fabric too. Many of our waistcoats are lined in cupro, such as this five-button navy check waistcoat, while some are lined in viscose. If the waistcoat is part of a three-piece suit for a wedding or an anniversary, check the composition of both the waistcoat and the jacket.