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Product guide

Thule Subterra 2 Convertible Carry-On

The Thule Subterra 2 Convertible Carry-On is designed to switch between backpack and duffel-style carrying, with a removable laptop attaché and an internal divider. Its listed capacity is 18 litres, so check whether that space suits your travel load before choosing it as your main carry-on.

At a glance

Stowable backpack straps and a shoulder strap allow backpack or duffel-style carrying.
The removable laptop attaché is described for a 16-inch laptop and 12.9-inch tablet, and can be carried separately.
An internal fold-flat divider is intended to separate belongings.
The side zip pocket is described for a water bottle, umbrella or small items. A separate back-panel pocket is described for a passport or wallet.
The listing says the dimensions comply with carry-on requirements for most airlines.

Price

$238.95Save 20%

Reference price: ~~$299.95~~

Price checked: Nov 13, 2026

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Pros and cons

Pros

Convertible carry options suit trips where carrying preferences change between transit and destination.
A removable tech attaché can separate a laptop and accessories from the main bag.
The fold-flat divider offers a way to organize belongings without permanently splitting the interior.

Cons

The listed 18-litre volume is modest for a carry-on intended to hold a larger travel load.

Technical specifications

18 specifications

Identity
Brand	Thule
Model	Subterra

Dimensions and weight
Dimensions listed	55 x 21 x 35 cm; 1.7 kg
Weight listed	1.7 kg
Storage volume	18 liters

Materials and protection
Water resistance listed	Water Resistant
Outer material	Polyester
Lining	Nylon
Shell type	Soft Shell

Carry and organisation
Carry options	Shoulder Strap, Backpack Straps
Laptop size maximum	16 inches
Number of pockets	1
Closure	Zipper

Care and identifying details
Care instructions	Hand Wash Only
Colour	Black
Size	One Size
Style number	3205057
Country of origin	Vietnam

What to know before buying

Listing details to confirm

The listing gives 18 litres as the storage volume, while manufacturer copy calls the product a 40L carry-on. It also lists one pocket and one compartment, although feature text describes several pockets and an internal divider. The dimensions appear in two formats, so confirm the capacity, pocket layout and measurements for the selected listing before purchase. Airline carry-on limits also vary, despite the listing's claim about most airlines.

What’s in the box

Included

Carry-on luggage

Who is it for?

A good fit for

Travellers who want backpack and duffel-style carry options in one bag.
People seeking a separate removable carry option for a laptop and accessories.
Short trips or commutes where the listed 18-litre capacity is sufficient.

Less suited to

Travellers needing a confirmed 40-litre capacity or more space for extended trips.
Buyers who require a single verified pocket and compartment count before purchase.

Thule Subterra 2 Convertible Carry-On · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 24 ratings

5 stars67%67%
4 stars10%10%
3 stars0%0%
2 stars12%12%
1 star11%11%

The supplied aggregate ratings lean favourable overall, but also include a notable share of low-star ratings. With no customer-comment summary available, they do not show what buyers liked or disliked. Treat the ratings as limited context and weigh the unresolved capacity and pocket-count discrepancies against your packing needs.

Frequently asked questions

Can it be carried as a backpack or a duffel?

The listing describes stowable backpack straps and a shoulder strap for duffel-style carrying.

What laptop size does the attaché support?

Manufacturer copy says the removable laptop attaché protects a 16-inch laptop and a 12.9-inch tablet.

How much can it hold?

The product details list 18 litres, but other manufacturer copy calls it 40L. Confirm the capacity for the selected listing before buying.

Will it meet my airline's carry-on limits?

The listing says it complies with carry-on requirements for most airlines, but limits differ by airline. Check the dimensions against your carrier's current rules.