Joybuy Insights

How to choose bags and backpacks without making the wrong purchase: practical tips for work, school and travel

A bag may look spacious in a product photo, yet disappoint in everyday use. For example, a laptop may only fit without its protective case, the shoulder strap may dig in, or a supposedly water-repellent backpack may only cope with light showers. When buying bags and backpacks, it therefore pays to look beyond colour and price.

Pay particular attention to these three common pitfalls:

  • Capacity without context: a capacity in litres does not tell you how efficiently the compartments are arranged. A 20-litre bag may be more practical than a poorly organised 30-litre bag.
  • Unclear water protection: “water-repellent” generally does not mean that a bag is completely waterproof. Check the material, coating and fastening.
  • Insufficient carrying comfort: wide straps and an adjustable shoulder strap make a difference in everyday use. A lightweight bag can still be uncomfortable if the weight rests on one point.

Which specifications should you check?

1. Dimensions and usable capacity

Start by considering what you actually carry. For a 15.6-inch laptop backpack, the external dimensions are not the only important factor; you should also check the dimensions of the laptop compartment. Laptops with a 15.6-inch screen can have different casing dimensions depending on the brand.

Use this practical guide:

  • 1 to 5 litres: suitable for a phone, wallet, keys and small everyday essentials. A compact crossbody bag usually falls into this category.
  • 9 to 15 litres: useful as a laptop bag or work bag for a laptop, documents and accessories.
  • 20 to 35 litres: suitable as a roomy daypack, travel backpack or foldable tote bag for clothes, shopping and extra belongings.
  • 30 to 35 litres: suitable for sportswear, shoes and a towel in a sports bag or gym bag.

Also consider the shape. A wide opening makes packing easier, while a roll-top or drawstring can keep the capacity flexible. A bag that expands significantly is useful when you sometimes carry very little and sometimes need extra space.

2. Material and protection against moisture

Polyester, nylon and ripstop fabrics are commonly used for bags and backpacks. Do not just check the name of the material; look at the finish as well. A PU coating on the inside can provide additional protection against splashes. Some models also state that the fabric is resistant to stains, oil or water.

That is not the same as being fully waterproof. In prolonged rain, use additional protection such as a laptop sleeve or rain cover. Also check the vulnerable points:

  • seams and stitching;
  • zips and drawstrings;
  • the base of the bag;
  • open mesh pockets;
  • the fastening of the laptop compartment.

A water-repellent backpack is particularly practical for cycling, walking between stations and short showers. For electronics, separate protection is still advisable.

3. Carrying options, weight and organisation

A lightweight bag can be comfortable for commuting, but carrying comfort also depends on the straps. Wide shoulder straps distribute the load more effectively than narrow ones. A detachable shoulder strap can be useful if you want to carry a bag by hand or over your shoulder, depending on the situation.

Also check whether the organisation suits your routine. A separate laptop compartment, document pocket, key clip or easily accessible front pocket means you do not have to rummage through everything. A backpack with a USB port can be practical on the go, but check whether it is an external connection that requires you to provide your own power bank. The USB port is usually not a built-in battery.

Our product choices for different needs

Suitable for: Budget-conscious beginners
Beneunder LC168 Lightweight Foldable Tote Bag

Beneunder LC168 Lightweight Foldable Tote Bag

Why it suits this profile: This foldable tote bag weighs approximately 220 grams and offers a standard capacity of 20 litres, expandable to 35 litres. This makes it suitable as an extra bag for shopping, travel or everyday use.

How this product avoids the pitfall

The stated capacity clearly indicates the standard and expanded configurations. An internal pocket and divider are also listed, so the large main compartment does not become completely disorganised.

Key benefit & highlights

Approximately 220 grams; expandable capacity up to 35 litres; can be carried by hand or as a backpack.

Suitable for: Buyers looking for premium quality
HP Everyday 14-Inch Laptop Bag

HP Everyday 14-Inch Laptop Bag

Why it suits this profile: A business laptop bag for professionals who value a structured layout and protection. This model has a 9-litre capacity and is suitable for laptops up to 14.1 inches.

How this product avoids the pitfall

The stated screen size prevents you from relying solely on the general term “laptop bag”. The padded laptop compartment and separate document and accessory pockets make the organisation easy to assess.

Key benefit & highlights

600D polyester; padded laptop compartment; trolley strap; detachable shoulder strap; 9-litre capacity.

Suitable for: Specific uses & intensive users
Capelli Sport LITE GYM BAG

Capelli Sport LITE GYM BAG

Why it suits this profile: This sports or gym bag is designed for training sessions, sports classes and short overnight stays. According to the product information, it has a capacity of around 30 to 35 litres.

How this product avoids the pitfall

The shoe or wet-items compartment keeps these belongings separate from your clothing. The flat, reinforced base also helps when the bag is put down regularly.

Key benefit & highlights

30–35 litres; ventilated shoe/wet-items compartment; two mesh pockets; detachable shoulder strap; 600D polyester or ripstop nylon.

Suitable for: Commuters and urban travellers
Expandable Business Travel Backpack 15.6 Inch

Expandable Business Travel Backpack 15.6 Inch

Why it suits this profile: A business travel backpack for combining a laptop, documents and accessories on train journeys, cycle rides or business trips. The product title specifies a laptop compartment for 15.6-inch devices and an external USB connection.

How this product avoids the pitfall

The stated laptop size helps when comparing compatibility. The USB connection provides convenient access, but requires a separate power bank, so do not expect built-in charging functionality.

Key benefit & highlights

Suitable for a laptop up to 15.6 inches; multiple compartments; expandable design; external USB port.

Looking for more options?

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

Frequently asked questions about bags and backpacks

Which bag is suitable for commuting?

That depends on what you carry and how you travel. For a laptop, documents and charger, a laptop bag or 15.6-inch laptop backpack is a sensible choice. If you cycle regularly, pay particular attention to adjustable straps, a stable back panel and a water-repellent backpack. A trolley strap can be useful for train travel.

How do you clean a bag?

Always follow the product’s care instructions. For many models, a damp cloth with mild detergent is sufficient. Machine washing, bleach and high temperatures can damage coatings, the shape and the zips. Allow the bag to air-dry completely before storing it.

How long does a bag or backpack last?

Its lifespan depends on the load it carries, the material, the seams and how it is maintained. Do not overfill a bag, and only use a laptop compartment for a device that falls within the stated size limit. Regularly check the zips, buckles and stitching. With normal use, a bag made from robust polyester with a reinforced base and well-finished seams can remain practical for longer than a model that is continually filled beyond its capacity.