How to choose a backpack or bum bag

✔ Recommendation: 20 l (the most versatile small volume)

• ACRA Backpack 20 L black BA20-CRN
• ACRA Backpack 20 L red BA20-CRV
• ACRA Backpack 20 L blue BA20-MO

✔ Recommendation: 35 l (best size/practicality ratio)

• ACRA Backpack 35 L blue BA35-MO
• 35 l orange hiking backpack

✔ Recommendation: 40–50 l, ideally with better stabilisation on the body

• ACRA Relaxing 40 L BA40-CRN Backpack
• Backpack for mountain hiking 50 l (Adventure 50)

✔ Recommendation: 60 l + sturdier construction (back, stability, straps)

• ACRA Adventure 60 L BA60-MO Backpack

✔ Recommendation: waist bag with bottle (fast, compact, practical)

• Sports waist bag with 0.6 l drink bottle
• Waist bag with 2 bottles (2× 0.17 l)

1) Volume (litres)

• 20 l – short trips, city, sports, “lightweight”
• 35 l – all-day trips, universal for most activities
• 40–50 l – weekend trips, light mountain hiking
• 60 l – longer hikes, more gear, heavier load

2) Back system and ventilation

If you don’t want to have a “wet back” after an hour, focus on:

• reinforced back + ventilation (better comfort)
• for larger rucksacks, also sturdier construction/frame for stability

3) Stabilisation on the body: chest and waist straps

This is a detail that often determines whether the rucksack “fits” or moves around:

• chest strap = the rucksack does not slip off the shoulders
• hip belt = relieves the shoulders (especially with larger volumes/loads)

4) Pockets, compartments and access

Practical minimum for normal use:

• 2 main compartments + side pockets
• front pocket for small items
• hiking rucksacks also have straps for equipment (poles, helmet, etc.)