We are looking a what our next car will be, and on looking at review videos on youtube a number of new cars have the option of 'vegan leather' upholstery. I google what this material is. Answer. POLYURETHANE! So instead of covering the seats in a natural, biodegradable product, it is a man made, from oil, that will break down into micro plastics, and take forever to totally degrade. AIBU to think that marketing companies take the public for fools?