Jeans is a type of pants or trousers, typically made from denim or dungaree cloth. It was originally invented by Jacob W. Davis in partnership with Levi Strauss & Co. in 1871 and patented by Jacob W. Davis and Levi Strauss on May 20, 1873. Jeans are a very popular form of casual dress around the world and come in many different styles, including skinny, straight, bootcut, flare, cropped and boyfriend fit. They are often decorated with pockets, rivets or zippers for added style and practicality. Jeans are usually worn with T-shirts or other casual tops but can be dressed up with blazers and other smarter pieces for more formal occasions.