Choosing an Outdoor Backpack: A Practical Buying Guide for Hiking, Travel and Everyday Use

An outdoor backpack needs to do more than just look tough. On British hiking trails, on the train and during a camping weekend, you’ll face changeable weather, varying loads and limited storage space. Yet many people buy a bag based solely on the number of litres or a striking product claim.

The following pitfalls are common:

• A large volume without proper weight distribution: a spacious backpack can become uncomfortable when there’s no chest strap, hip belt or adjustable shoulder straps.
• Confusing “waterproof” with water-repellent: a water-repellent fabric may temporarily hold off light rain, but that doesn’t automatically mean the seams and zips are fully waterproof.
• Too many pockets without a logical layout: a backpack with lots of pockets may seem practical, but small compartments can reduce the usable space.
• Prioritising low weight over protection: a lightweight backpack is handy, but thin material may be less suitable for rough terrain, sharp branches or heavy camping gear.

Which specifications should you check?

1. Choose the capacity based on your use

Capacity is usually given in litres. A 30-litre backpack is often suitable for a day hike, commuting or a short city break. For a multi-day trip with sleeping gear and cooking equipment, you’ll be better off with a 45-litre backpack or 50-litre backpack.

Use this guide as a starting point:

• 10–15 litres: daily essentials, cycling, short walks or a compact packable backpack.
• 20–30 litres: day trips, school, commuting and light travel.
• 35–45 litres: trekking, backpacking and camping with compact gear.
• 50 litres or more: larger camping equipment or trips where you want to pack less often.

Also pay attention to the shape. A bag with a large main compartment can offer more practical space than a model with lots of small pockets. Additionally, check whether the dimensions are suitable for hand luggage when you’re flying; airlines have different rules.

2. Comfort is more than just soft shoulder straps

A hiking backpack should sit securely against your back. So check:

• whether the shoulder straps are adjustable;
• whether a chest strap is present;
• whether a hip belt can distribute the weight;
• whether the back panel offers ventilation;
• whether the size suits your height.

A mesh back panel can improve airflow, but it won’t automatically prevent sweating. With a heavy load, a chest strap and hip belt are generally more important than extra padding alone.

3. Look at material, closures and rain protection

Nylon, polyester and Oxford fabric are commonly used for an outdoor backpack. Don’t just look at the material name, but also at the construction: seams, zips, buckles and attachment points all help determine how practical the bag is to use.

When it comes to rain, note the difference between:

• water-repellent: the outer fabric can temporarily fend off light precipitation;
• water-resistant: the material is designed to hold back moisture better, but the whole bag isn’t necessarily sealed;
• waterproof: the entire construction, including seams and closures, must meet a clear standard or test method.

If it only says “anti-splash” or “rain-resistant”, take a rain cover or waterproof dry bag for electronics, clothing and sleeping gear.

Our recommendations by user profile

Suitable for: Budget-conscious beginners

Salomon Trailblazer 30 Backpack C21833

Why this fits the profile: The 30-litre capacity suits day trips, urban use and short breaks. The combination of multiple pockets and an ergonomic design makes the bag versatile.

How this product avoids the pitfall

The product description mentions improved shoulder straps and back panel, breathable mesh and multiple storage pockets. Do check the fit and maximum load before buying.

Key benefit & highlights

30-litre capacity, nylon and polyester fabric, breathable mesh and multiple compartments.

Suitable for: Shoppers seeking top quality

Mobi Garden Phantom Pro 3D Dyneema 45L Backpack

Why this fits the profile: This hiking backpack is designed for backpacking, hiking and trekking. The 45-litre capacity offers room for multi-day gear without going up to a 50-litre model.

How this product avoids the pitfall

The specifications mention a 3D ventilated back panel, hip belt, chest strap and a separate waterproof hydration sleeve. The bag isn’t automatically fully waterproof; protect loose items separately.

Key benefit & highlights

45-litre capacity, Dyneema composite fabric, external attachment points and a separate hydration compartment.

Suitable for: Specific use & intensive users

vidaXL Military-Style Backpack – 50 L

Why this fits the profile: The 50-litre capacity is aimed at campers, hikers and travellers who carry larger amounts of gear.

How this product avoids the pitfall

The bag has an adjustable chest strap, hip belt, compression straps and a mesh back panel. With a 50-litre capacity, careful packing is important to avoid overloading.

Key benefit & highlights

50-litre capacity, four stated pockets, coated Oxford fabric and adjustable carrying components.

Suitable for: Light travel and daily use

Beneunder LC183 Expandable Backpack 10L

Why this fits the profile: This compact travel backpack is suitable for commuting, school, short outings and as an extra bag inside a suitcase.

How this product avoids the pitfall

According to the product information, the bag can be expanded from 10 to 13 litres and has a fabric that is described as helping to resist wind, rain and stains. That’s not a guarantee of full waterproofing.

Key benefit & highlights

8.3 oz product weight, expandable capacity from 10 to 13 litres and two adjustable shoulder straps.

How to avoid a bad purchase

Check these points before ordering:

1. Measure your back and compare sizing. A one-size-fits-all option doesn’t automatically suit every body.
2. Look at the product photos for zips, straps and attachment loops. These are practical details that often get little attention in short marketing texts.
3. Consider the weight including contents. A bag weighing 1.35 kg with full camping gear feels different from a lightweight daypack with just clothes and water.
4. Take a rain cover or dry bag if you’re carrying electronics, documents or sleeping gear.
5. Check the warranty and return policy. In the EU, consumers generally have a statutory warranty of at least two years, with additional rights that may apply under relevant national rules.

Frequently asked questions about outdoor backpacks

How many litres do I need for a day hike?

For most day trips, 20 to 30 litres is a practical starting point. If you’re taking extra clothing, a camera, lunch and plenty of water, 30 litres may be more convenient. For a multi-day trip, you’ll usually need a hiking backpack of 45 litres or more.

Is an outdoor backpack automatically waterproof?

No. Outdoor fabrics can be water-repellent or water-resistant without the seams and zips being fully waterproof. Look for a specific waterproof claim or use a rain cover and waterproof inner bags.

How long does an outdoor backpack last?

The lifespan depends on the material, load, maintenance and usage conditions. Avoid overloading, store the bag in a dry place and clean off mud with a damp cloth when needed. Regularly check seams, zips, buckles and straps for wear and tear.