![Foldable backpack](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
The size of the backpack you need depends on three factors: the length and location or environment of the hike, as well as the season or the weather conditions to be expected. These three factors help you determine the type and amount of equipment needed and thus the size of the backpack for transporting this equipment.
Backpacks for day hikes (less than 25 litres)
If you are out for a few hours, you usually only need water, one or two additional garments for weather changes, food and hiking poles.
Backpacks for overnight hikes (1 night; 25-35 litres)
With just one overnight stay, you dont have to have everything you need. Pack easily and the hike to camp and back will make you more fun. These backpacks can also be used for longer day hikes.
Backpacks for hiking and multi-day tours (2-4 days; 40-50 litres)
Longer tours require a larger backpack, in addition to camping equipment, more food, cooking fuel and clothes to change.
Backpacks for longer hikes (5+ days; 60-75 litres)
Apart from long hikes, these larger backpacks are also good for parents who are planning shorter winter trips with younger children where extra warm gear is needed.