Diesel is the denim brand founded in 1978 by Renzo Rosso whose name is associated with fuel and an alternative lifestyle.
Rosso established the company in Italy during a period when diesel fuel was increasingly viewed as an alternative to traditional gasoline. He chose the name to suggest an international, unconventional identity rather than a narrowly Italian clothing label.
Diesel became especially known for jeans, provocative advertising, and premium casualwear. Its branding helped distinguish it from heritage workwear companies whose marketing emphasized durability and industrial use.
The brand is sometimes confused with G-Star Raw because both became internationally recognized for fashion-forward denim. Their origins differ: Diesel is Italian and dates from 1978, while G-Star Raw began in the Netherlands in 1989.