Choosing bags and rucksacks: how to find the right practical option for travel, work and everyday use

A bag can look spacious and sturdy in a product photo, but disappoint in real life. A laptop compartment that’s too small, unclear dimensions or a flimsy fastening can quickly become frustrating. So if you’re looking for bags and rucksacks, it’s worth considering more than just the colour and price.

The most common pitfalls are:

• Confusing capacity with usable space: the stated volume doesn’t tell you much if the main compartment is narrow or pockets and zips take up a lot of room.
• Confusing water-repellent with waterproof: a coating can help in light rain, but it won’t necessarily protect your belongings during prolonged rainfall.
• Overlooking dimensions: especially with an underseat rucksack, a difference of a few centimetres can determine whether it fits beneath the seat.
• Underestimating carrying comfort: wide straps, an adjustable shoulder strap or a padded back panel make a difference when you use the bag every day.

Which features should you check?

1. Dimensions and capacity

For a travel rucksack or underseat rucksack, the external dimensions matter more than the stated capacity in litres alone. If you’re travelling with Ryanair, you’ll often see searches for Ryanair 40x20x25 hand luggage. A bag with these dimensions is designed to fit beneath the seat, but always check the airline’s current requirements before you travel and measure the bag when it’s fully packed.

For everyday use, around 16 to 24 litres is often enough for a coat, lunch, water bottle and a few accessories. A 35-litre bag offers more flexibility, but may be unnecessarily large for commuting.

2. Laptop compartment and layout

A laptop rucksack shouldn’t just state a screen size in inches. Check the following too:

• Whether the laptop is stored horizontally or vertically.
• Whether the compartment is padded.
• Whether the device is held securely in place.
• Whether there’s room for a charger, documents and accessories.
• Whether the bag’s overall external dimensions will fit in your bike basket, locker or luggage compartment.

A stated size of 15.6 inches doesn’t mean every laptop of that size will fit. Laptop models vary in bezel thickness and casing.

3. Materials, fastenings and care

Polyester, nylon and canvas each have their own qualities. Nylon is often lightweight and flexible, while canvas has a different look and can work well for school or everyday use. Look out for terms such as water-repellent, water-resistant or “suitable for light rain”. Product descriptions from various brands may say that a coating helps protect against splashes, but that doesn’t guarantee the bag is fully waterproof.

Check the zips, seams and handles too. A foldable bag is handy as an extra shopping bag or spare piece of luggage, but it isn’t always designed for heavy, sharp or fragile items. Care instructions matter as well: some materials should be cleaned with a damp cloth and must not be put in the washing machine.

Our recommendations for different needs

Suitable for: Budget-conscious beginners

Beneunder GP155, Tote-Foldable Shoulder Bag, Light Pink

Why it suits this profile: This foldable bag is designed for shopping, days out or as an extra bag in your suitcase. According to the product description, its capacity can be expanded to 16 litres.

How this product avoids the pitfall

The stated dimensions and weight of around 64 grams make it clear that this is a lightweight carry bag, not a heavy-duty work or laptop rucksack.

Key benefit & features

Around 64 grams, foldable design, wider shoulder straps and expandable capacity of 16 litres.

Suitable for: Shoppers looking for top quality

15.6 Inch Rolltop Laptop Backpack Water Repellent Large Capacity

Why it suits this profile: The roll-top design gives you flexibility when you need to carry more on some days and less on others. It’s a good fit for commuters and students who carry a laptop, documents and everyday essentials.

How this product avoids the pitfall

The product name specifies a 15.6-inch laptop size and water-repellent material. Be sure to check your laptop’s exact dimensions, and use extra protection in heavy rain.

Key benefit & features

Suitable for a 15.6-inch laptop according to the product listing, with a roll-top fastening and multiple compartments for everyday use.

Suitable for: Specific needs & frequent users

Kono Cabin Bag 40x20x25 for Ryanair, 20L, Black

Why it suits this profile: This travel rucksack is designed for travellers who want to stow their bag under the seat and pay close attention to dimensions. Its stated capacity is 20 litres.

How this product avoids the pitfall

The dimensions are clearly stated in the product name: 40x20x25 cm. Measure the bag once it’s packed and compare it with your flight’s baggage rules.

Key benefit & features

20 litres of capacity, compact external dimensions and a rucksack design for hands-free carrying while travelling.

Suitable for: Budget-conscious beginners

Miss Lulu Crescent Crossbody Bag for Women

Why it suits this profile: This lightweight bag is ideal for your phone, purse, keys and other everyday essentials. The adjustable strap lets you wear it as a crossbody bag or shoulder bag.

How this product avoids the pitfall

Its capacity and dimensions are suited to everyday essentials, so you’re less likely to carry a bag that’s too large for a short trip out.

Key benefit & features

Dimensions of 30 x 9 x 30 cm, weight of around 150 grams, adjustable strap and, according to the product description, water-repellent polyester.

A handy guide to choosing the right bag for you

• For school or the office: choose a laptop rucksack with a suitably sized, padded compartment and enough room for documents.
• For commuting: look for a lightweight bag, adjustable straps and a layout that makes it easy to reach your things every day.
• For air travel: compare the external dimensions with the baggage rules and pack the bag at home to check it fits.
• For shopping or as a spare: a foldable bag with a low weight takes up little space when you’re not using it.
• For everyday use: a women’s shoulder bag or crossbody bag is a good choice if you only need to carry a few small personal items.
• For carrying different amounts: an expandable model with a capacity of 20 to 35 litres may be more practical than having several bags.

Frequently asked questions about bags and rucksacks

How do I choose the right size bag?

First, work out what you carry every day, then measure your largest items, such as your laptop, lunchbox or folder. Compare those measurements with the internal dimensions of the bag. For air travel, the external dimensions are what count, including handles and any fully packed compartments.

How long does a bag usually last?

A bag’s lifespan depends on its material, how much it carries, how often you use it and how well you look after it. A bag that’s packed heavily every day puts more strain on its zips and seams than one used occasionally. Avoid overloading it, clean stains according to the care instructions, and check the seams and fastenings regularly.

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

According to the product description, a water-repellent bag can offer protection from light rain or splashes. If you’ll be cycling for a long time in heavy rain, it’s sensible to add extra protection, such as a rain cover or a waterproof cover for the contents. Check the zips and seams too, as moisture can still get in through these areas.