Backpacking is a form of low-cost, independent travel, which often includes staying in inexpensive lodgings and carrying all necessary possessions in a backpack. Once seen as a marginal form of travel undertaken only through necessity, it has become a mainstream form of tourism.
While backpacker tourism is generally a form of youth travel, primarily undertaken by young people during gap years, it is also undertaken by older people during holidays, a career break, or at retirement, or by digital nomads, as part of a minimalist lifestyle.[citation needed] As such, backpackers can be of any age, but are typically aged 18 to 30.[1]