evidence: When assessing the sustainability credentials of vegan leather, we need to look at its raw properties and how its made – not all vegan leather is created equal. As we've stated, some vegan leather is made from plant-based materials, while others are created from artificial products. Nanushka, for example, uses vegan leather that’s polyurethane-based, which is a plastic material. The inclusion of these artificial products can be where sustainability issues arise. [...] Sustainable designer Jourdan Norcose of Boyish Jeans, explains that designers should be wary about some forms of vegan leather that are more plastic-based.