It¡¯s soft. It¡¯s vegan. It looks just like leather.

It¡¯s also made from fossil fuels.

An explosion in the use of inexpensive, petroleum-based materials has transformed the fashion industry, aided by the successful rebranding of synthetic materials such as plastic leather (once less flatteringly referred to as ¡°pleather¡±) into hip alternatives such as ¡°vegan leather,¡± a marketing masterstroke meant to suggest environmental value.