Levi Strauss & Co. is a global apparel company founded in 1853 in San Francisco. It manufactures and markets jeans, casual wear and other clothing under the Levi's, Dockers, and Denizen brands. The company owns the patent for riveted jeans and pioneered jeans as durable work clothing. Levi's jeans became a popular fashion item in the 20th century and the company grew to become the largest jeanswear manufacturer in the world. Today Levi Strauss uses a variety of marketing strategies to promote its iconic brands while maintaining a sustainable and socially responsible supply chain globally.