The name comes from Duffel, a small town in Flanders, Belgium. The thick Duffel used to make bags originated in the 17th century. According to the "Oxford English Dictionary", the history of this word can be traced back to 1677 and is used to describe "coarse wool". A cloth with thick fluff or ribbon-like fluff. For most of the 20th century, the duffel bag usually referred to a specific style with a cylindrical shape and a top into the bag. In the following sections, the term begins to apply to the general hoop processing, hard-bottomed fabric tote bag, often referred to as "fitness bag". Other features are often added to this bag, such as wheels, zippers, internal structure and small organizer bags.