Backpacks for day hikes (Less than 25 liters)
For a couple hours on the trail, you typically only need water, an extra piece or two of clothing for unexpected weather, some nutrition and hiking poles.
Backpack packs for overnight hikes (1 night; 25-35 liters)
When heading out for a night, there is no need to bring everything. Pack light and it will make the hike to and from your camp more enjoyable. These packs can also be used for extended day hikes.
Backpacking packs for hiking and multi-day trips (2-4 days; 40-50 liters)
Longer trips will require a larger pack to hold more food, cooking fuel and extra clothing in addition to your camping gear.
Backpacking packs for longer treks (5+ days; 60-75 liters)
In addition to working for longer treks, these bigger packs are also good for parents heading out with younger children or shorter winter trips that require even more gear to keep you warm.