1 / 7Karactermania Mercury Backpack Nasa, 20 L Underseat Cabin Bag
The Karactermania Mercury Backpack Nasa is a 20-litre underseat cabin backpack with a laptop compartment and space-themed design. Its listing describes multiple compartments, a separate wet-item pocket and suitcase attachment, but airline size compliance and water protection should be considered in light of the specifications provided.
At a glance
- Three compartments and a 180-degree opening are described for access to the interior.
- A padded laptop compartment is listed for devices up to 15 inches, with a padded pocket for a tablet or smaller accessories also described.
- The listing describes a waterproof wet compartment, a water-bottle side pocket and an exterior front pocket.
- A rear luggage strap can attach the backpack to a rolling suitcase, and the shoulder straps are reinforced with a chest strap.
- Four side straps are described as allowing volume adjustment.
Pros and cons
Pros
- The compartment layout and separate wet-item section can help keep damp belongings apart from the main contents.
- The luggage strap and chest strap offer two practical carrying options for travel.
- Listed at 0.74 Kilograms, it has a low stated empty weight for a cabin backpack.
Cons
- The listed 20-litre capacity makes it a compact option rather than a high-capacity travel bag.
Technical specifications
20 specifications| Brand | Karactermania |
|---|---|
| Model | Mercury Backpack Nasa |
| Colour | Blue Nasa |
| Capacity | 20 Liters |
| Age range | Adult |
| Recommended use | Leisure |
| Listed dimensions | 25D x 20W x 25H centimetres |
|---|---|
| Title size description | Underseat 40x20x25cm |
| Weight listed | 0.74 Kilograms |
| Straps | Adjustable shoulder straps reinforced with chest strap |
| Shell type | Soft Shell |
| Material listed | Polyester |
|---|---|
| Lining | Polyester with printed design |
| Water resistance listed | Waterproof |
| Care | Wipe clean with a damp cloth and let air dry |
| Laptop size maximum | 15 Inches |
|---|---|
| Pocket description | 7 pockets/compartments |
| Number of pockets | 5 |
| Number of compartments | 3 |
| Closure | Zipper |
What to know before buying
Listing details to confirm
The size information is inconsistent: the title calls it 40x20x25cm, while the listed item dimensions are 25D x 20W x 25H centimetres. The listing says it conforms to most airlines' carry-on rules, but this is not confirmed for any particular airline. It also lists five pockets, three compartments and a description of seven pockets/compartments, so verify the dimensions and layout against the selected listing before buying.
Who is it for?
A good fit for
- Travellers seeking a compact backpack with an underseat-style size description and suitcase attachment.
- Buyers wanting a padded laptop compartment, subject to confirming their device fits the stated 15-inch maximum.
- People who want separate storage for wet items and a water bottle.
Less suited to
- Travellers who need a larger-capacity bag than the stated 20 litres.
- Anyone who needs verified dimensions for a specific airline or an explicitly confirmed waterproof rating for particular conditions.

Customer reviews on Amazon
- 5 stars
80% 80% - 4 stars
11% 11% - 3 stars
9% 9% - 2 stars
0% 0% - 1 star
0% 0%
Frequently asked questions
What capacity is listed for the Mercury Backpack Nasa?
The listed storage volume is 20 Liters.
What are the stated dimensions?
The title gives Underseat 40x20x25cm, while the item-dimensions field gives 25D x 20W x 25H centimetres. These details conflict, so confirm the dimensions for the selected listing.
What size laptop does the compartment accommodate?
The listing gives a compatible device size maximum of 15 Inches. Check your device's dimensions as well as its screen size before purchase.
Does it have a separate wet-item compartment?
Yes. The description identifies a waterproof front compartment for separating wet items from the rest of the contents.

Alternative options

Karactermania NASA Lines-Small Fan HS Backpack, Orange, 25 x 35 cm, Capacity 12 L
€27.00

Nasa Roll Top Bag For Boys Space Backpack Astronaut Sports Rucksack School Bag, Orange, One Size
€38.02

Karactermania NASA Lines-Fan Square Pencil Case 2.2, Orange, 22 x 9 cm, Orange, One Size, FAN 2.2 Square Pencil Case Lines
€8.85

Amythe School Backpack Boys Backpack School Boys 1st - 5th Class, navy, M | Breathable school bag for boys, casual school bag children for primary school middle school
€38.71

Bansusu Galaxy-Print Backpack Rucksack For Boys Middle-School Elementary Bookbag
€33.35

Karactermania NASA Lines-Fan HS Backpack 2.2, Orange, 31 x 44 cm, Capacity 24 L, Orange, One Size, FAN HS Backpack 2.2 Lines
€32.20























