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

Buying a backpack seems simple, until you find that it doesn’t fit under the aeroplane seat, barely protects your laptop or becomes uncomfortable on your shoulders. What’s more, marketing terms such as “large capacity”, “waterproof” and “anti-theft” don’t always tell you enough about how a bag performs day to day.

So, keep an eye out for these common pitfalls:

• Dimensions can be misleading: the capacity in litres doesn’t tell you whether a bag meets an airline’s hand luggage requirements.
• A laptop compartment won’t necessarily fit your laptop: check the screen size in inches and the compartment’s dimensions too.
• A USB port won’t charge devices on its own: you’ll need your own power bank and cable. The port simply connects to the power bank inside the bag.
• “Water-resistant” doesn’t mean waterproof: a water-resistant backpack will usually protect you from light rain, but not necessarily prolonged or heavy downpours.

Which specifications should you check before buying a backpack?

1. Dimensions and usable capacity

If you’re looking for a Ryanair cabin backpack or another hand luggage backpack, first check the size allowance for your flight. Rules can vary by ticket type and airline. Measure the backpack, including any parts that stick out, and allow for overfilled side pockets.

A 40 x 20 x 25 cm model is designed to work as a compact personal item. A 40 x 30 x 20 cm bag offers more space, but may come under a different baggage allowance. Always check your airline’s current rules before you travel.

As well as the external dimensions, consider:

• The capacity in litres and the shape of the main compartment.
• A clamshell opening, which is handy when packing clothes.
• Compression straps to make a partly filled bag more compact.
• A trolley strap for use with a wheeled suitcase.

2. Laptop compatibility and protection

A 15.6-inch laptop backpack won’t necessarily fit every laptop of that size. Manufacturers allow for different clearances and use different layouts, so check both the maximum screen size and the available internal space.

A padded laptop compartment is useful for commuting, school and business trips. Ideally, place your laptop close to the back panel, and avoid putting hard objects in the same compartment where they could press against it. A separate sleeve or extra protection may be useful if you cycle or travel by public transport regularly.

3. Material, comfort and everyday features

A lightweight backpack reduces the weight you carry every day. At the same time, check the strength of the fabric, seams, zips and handle. Polyester and Oxford fabric are often used for school and business backpacks, though their properties vary from one product to another.

A backpack with a USB port is handy if you want to charge your devices on the go, but check whether:

• The power bank is sold separately.
• You can access the cable inside the bag.
• The USB port is just a connection and doesn’t contain a built-in battery.
• You use a suitable power bank and cable.

For cycling or walking, padded shoulder straps, a breathable back panel and an adjustable chest strap are all worth considering. A business backpack often benefits more from a laptop compartment, space for documents and an organiser, while a travel backpack is better suited to roomy compartments and easy access.

Our recommendations for different needs

Suitable for: Budget-conscious beginners

PUMA Academy Backpack Black Unisex

Why it suits this profile: A practical everyday backpack for school, studying or a short commute, without specific travel features you may not need.

How this product avoids the pitfall

The stated dimensions of 45 x 30 x 18 cm and capacity of around 24 litres make the available space clearer than a general claim of “large capacity”.

Key benefits and features

Two main compartments, mesh side pockets, padded shoulder straps and a padded back panel. According to the product information, at least 70% of the material is made from recycled materials.

Suitable for: Shoppers looking for premium quality

Kono Ryanair Cabin Backpack 40x30x20cm

Why it suits this profile: Designed for holidaymakers and business travellers looking for a hand luggage backpack for short trips, commuting and flights.

How this product avoids the pitfall

The external dimensions, weight of around 0.5 kg and capacity of approximately 24 litres are clearly stated. Always check your flight’s baggage allowance too.

Key benefits and features

Water-resistant polyester, three compartments, a padded compartment for a 15.6-inch laptop, a trolley strap and compression straps.

Suitable for: Specific needs and frequent use

KONO Laptop Backpack with USB Charging Port

Why it suits this profile: A business backpack for work, study and everyday travel, with laptop protection, organisation and easy access to a power bank.

How this product avoids the pitfall

The product information clearly states that the power bank is not included. The combination lock is a deterrent, not a guarantee of security.

Key benefits and features

Fits laptops up to 15.6 inches and features multiple pockets, a USB port, a removable three-digit lock, and padded, breathable shoulder straps. The stated weight is approximately 0.73 kg.

Which backpack is right for you?

• For air travel: choose based on the permitted external dimensions first, then consider capacity. A compact Ryanair cabin backpack may also suit other airlines, but check the allowance for each flight.
• For students and school pupils: look for space for a laptop, A4 books, lunch and a water bottle. A school backpack with several compartments helps keep smaller items from getting lost at the bottom.
• For commuters: a lightweight backpack with a padded laptop compartment, USB pass-through and trolley strap is handy for train journeys, cycling and the office.
• For men and women: fit depends mainly on back length, adjustability and shoulder straps, not just the product name. A unisex model may suit different people if the straps adjust well.

Frequently asked questions about buying a backpack

What capacity is best for an everyday backpack?

For work, school or commuting, around 15 to 25 litres is often practical. If you need to carry clothes, lunch and equipment, a larger capacity may be useful. Always check that the bag doesn’t become too large or heavy when packed.

How long does a backpack typically last?

Its lifespan depends on how heavily it’s used, the materials, zips, exposure to moisture and how well it’s cared for. Avoid overloading it, use both shoulder straps and clean the bag according to the instructions. A model made from polyester or Oxford fabric may be water-resistant, but you’ll need extra protection in prolonged rain.

Is a backpack with a USB port worth the extra cost?

It depends on how you use it. The feature is handy if you carry a power bank and want to charge your phone while on the go. However, you’re not paying for a built-in battery: you’ll need to buy the power bank separately and store it safely in the bag.