A backpack is an essential part of your gap year kit and you might find yourself growing very attached to it and greeting it like a long-lost friend every time it appears on the conveyor belt at the airport.
Your backpack is your most precious possession and will need to be durable enough to survive the rigours of travel as it will get tossed about on a variety of different modes of transport and may have to endure long bus journeys whilst tied to the roof. It protects your essential belongings from the rain, sun, mud, sand etc. You may spend a lot of time with it strapped to your back, so choosing the right one is an important decision.
Things to consider when choosing a backpack are:
A backpack is one of your essential items for your gap travel preparation and making sure you get the right one means you'll be well on your way to the ultimate gap year trip.