"The Versatile Backpack". The backpack is not for the person who lives monotonous in multiple stereotypes; it is primary for the person who wants to be "different" and the way of his thinking together with his style makes him particular in community. The main idea is to create a functional, aesthetic and variable backpack serving people's needs (e.g. in education, at work, when shopping, travelling, in leisure activities, etc.). Backpack consists of three main self-contained bodies fully variable and adaptive to meet both the purpose and customer's requests. To meet criteria of ergonomics, the backpack provides the customer with quick access to things, limpidity, safety, strength and form simplicity, usability, interior parting, closing and covering, the right size and variability selected, accurate measurement as well as weighing balance.