Is a 40 litre rucksack big enough?
For two to four days sleeping indoors, yes: hostels, B&Bs, mountain huts or a walking holiday. It is also enough for one or two nights of summer wild camping if your tent and sleeping bag pack small. For longer trips or winter camping, step up to a 60L or 65L trekking rucksack.
40L or 50L hiking rucksack?
- 36–40L is lighter and trimmer, suited to the Camino, hut trips and long days on the hill with extra layers.
- 42–50L adds room for a sleeping bag or bulkier winter layers, and suits a first overnight camp with compact kit.
What matters at this size
- Adjustable back length, so the hip belt sits where it should once the pack is loaded.
- Ventilation, such as Osprey's AirSpeed and Deuter's Aircomfort mesh backs, for long days with weight on.
- Separate compartments, such as a base compartment for a sleeping bag and a lid pocket for the things you reach for most.
- Rain protection. Some Deuter packs have a built-in rain cover; for others, add a rucksack rain cover.
- A women's fit from Osprey's women's range or Deuter's SL packs. See all women's rucksacks.
Walking the Camino?
Most Camino walkers choose a 36–40L rucksack, because you carry everything, every day, for weeks. A common rule of thumb is to keep the loaded pack to around a tenth of your body weight, so pick the lightest pack that fits you well. Our guides cover what you will need for the Camino and what a typical day on the Camino looks like, and you will find liners, water systems and more in our Camino essentials.
40L and 50L rucksack FAQs
Is 50L enough for wild camping?
For two or three summer nights with lightweight kit, yes. In colder months, or with a heavier tent, 60–65L is more comfortable.
Is a 40L rucksack good for hillwalking?
Yes, for long winter days or when you carry group kit. For most summer day walks, a 25–30L daypack is lighter and easier.
Packing for a flight rather than the hills? See our travel backpacks and cabin bags. Compare every size in our hiking backpacks and rucksacks.
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