Joybuy Insights

Buying a backpack: how to choose a practical model for school, work or travel

A backpack may seem straightforward to choose, but small differences can quickly affect how comfortable it is to use every day. A bag that’s too small forces you to cram your belongings inside, a laptop compartment without enough protection offers little peace of mind, and a water-repellent outer layer isn’t automatically waterproof.

These are the main pitfalls for students, school pupils, commuters and travellers:

  • Confusing size with capacity: the outer dimensions don’t tell you exactly how much usable space there is inside.
  • Confusing water-repellent with waterproof: splashes are usually not a problem, but prolonged rain can still get in.
  • Choosing a laptop compartment without checking the measurements: “for 15.6-inch laptops” is a guideline; the actual dimensions of your laptop and the compartment may differ.
  • Focusing too much on extra features: a USB port only works with your own power bank. It isn’t a built-in charger.

Which specifications should you check?

1. Dimensions and capacity

For everyday use, a backpack of around 16 to 24 litres is often a practical mid-range option. A compact model is easier to fit under a seat or take on public transport. For school, work or a short trip, you’ll usually need more room for a laptop, charger, lunch, documents and perhaps some clothes.

If you’re looking for a carry-on backpack, don’t just check the capacity: pay close attention to the airline’s maximum permitted outer dimensions. If a model is advertised as a Ryanair backpack, compare its measurements with the current baggage rules for your flight. These can vary depending on your fare and ticket type.

A cabin backpack with a clamshell opening is handy if you want to pack clothes flat. A traditional model with a top zip is often more compact for school or commuting.

2. Laptop compartment and organisation

As well as checking the screen size, make sure you check:

  • the height, width and thickness of your laptop;
  • whether the compartment is padded;
  • whether the laptop sits clear of the bottom or rests directly on it;
  • whether there’s room for a tablet, charger and documents;
  • whether you can access the compartment from the outside.

A backpack for a 15.6-inch laptop may suit many standard laptops, but always check the product dimensions. A well-organised interior also helps prevent heavy items from pressing directly against your laptop.

3. Material, carrying comfort and rain resistance

Polyester, Oxford fabric and canvas are all common materials. Don’t just look at the material name: the construction matters too. Seams, zips, shoulder straps, the back panel and the base all affect how a backpack feels in everyday use.

A water-repellent backpack is designed to resist light rain or splashes for a short time. Product information from PELLIOT, LI-NING and NINETYGO uses similar terms, but also states that these models aren’t fully waterproof. In heavy rain, use a rain cover or protect your laptop in a separate case.

For comfort, look for adjustable, padded shoulder straps, a supportive back panel and a practical carry handle. If you cycle every day or walk a lot, a well-adjusted backpack is more useful than a long list of extra features.

Our recommendations for different uses

Suitable for: Budget-conscious beginners
PUMA Phase Backpack Black-Gold-No.1 Unisex

PUMA Phase Backpack Black-Gold-No.1 Unisex

Why it suits this profile: With a capacity of around 22 litres and a simple layout, this backpack works well for school, sport and everyday use without being specifically designed for travel.

How this product avoids the pitfall

The stated dimensions of 44 x 30 x 14 cm and capacity of 22 litres give you a clearer idea of the size than a vague description such as “roomy”.

Key benefits and features

Two-way zip, front pocket, mesh side pocket, padded back panel and adjustable shoulder straps. According to the product information, at least 90% of the material is made from recycled materials.

Suitable for: Shoppers looking for premium quality
Kono Ryanair Cabin Backpack 40x30x20cm

Kono Ryanair Cabin Backpack 40x30x20cm

Why it suits this profile: This model is designed for short trips, business travel and commuting, where laptop protection and an organised packing layout matter.

How this product avoids the pitfall

The product information gives both the external dimensions, 40 x 30 x 20 cm, and the weight, 0.5 kg. Be sure to check the baggage rules for your specific flight.

Key benefits and features

Around 24 litres of capacity, a padded compartment for a 15.6-inch laptop, a 180° opening, compression straps and a luggage strap. The polyester is described as water-repellent.

Suitable for: Specific needs and intensive use
NINETYGO College-Style Dual-Shoulder Backpack

NINETYGO College-Style Dual-Shoulder Backpack

Why it suits this profile: The layout is designed for students and anyone who carries books, a laptop and accessories every day.

How this product avoids the pitfall

The manufacturer specifies 900D tear-resistant fabric and water-repellency level 4, but also warns that the bag isn’t fully waterproof.

Key benefits and features

Three front pockets, a separate side compartment for laptop access, and reinforced side pockets for a bottle or wet umbrella. Check the stated laptop size, as the product information lists different sizes.

Suitable for: Students and school pupils
Kono School Bag Anime Luminous School Backpack

Kono School Bag Anime Luminous School Backpack

Why it suits this profile: A school backpack with room for A4 materials, a laptop and everyday accessories, plus a stand-out design for young people.

How this product avoids the pitfall

The product description specifies Oxford fabric, several compartments and hand-washing for care. This makes clear that the bag isn’t intended for machine washing.

Key benefits and features

Room for a laptop up to 15.6 inches, A4 books and side pockets, plus a pencil case included. According to Kono’s own product information, the design can glow after exposure to light; the USB port requires your own power bank.

Looking for more options?

We’ve put together a complete, up-to-date list of products that meet these strict selection criteria and the applicable European safety requirements.

Frequently asked questions about backpacks

Will a 40 x 30 x 20 cm backpack always count as hand luggage?

Not always. Permitted dimensions depend on the airline, fare and type of baggage. Check the latest conditions for your booking before you travel. Measure the bag when it’s full, as compression straps don’t always reduce its outer dimensions enough.

How long does a backpack usually last?

That depends on how you use, load and care for it. Heavy daily use puts the most strain on zips, seams and shoulder straps. Don’t overfill the bag, keep sharp objects in a separate compartment and follow the manufacturer’s washing or cleaning instructions. If a bag should only be cleaned with a damp cloth, don’t put it in the washing machine.

Is a water-repellent backpack suitable for cycling in the rain?

It may be enough for short periods in light rain. However, water-repellent doesn’t mean waterproof. In prolonged or heavy rain, a rain cover and an extra laptop case are sensible additions. This helps reduce the risk of books, clothes or electronics getting damp.