Black Ember Citadel 18 vs. Aer Tech Pack 2

Two carry-on travel backpacks, compared spec for spec.

Black Ember Citadel 18

Front facing view of the Black Ember Citadel 18
Capacity18 L
Weight1.3 kg
Dimensions43×29×16 cm
Airline fit95%
Price$240

Feature by feature

Black Ember Citadel 18FeatureAer Tech Pack 2
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
top Passport top
Y Passthrough Y
Carry
Y Backpack Y
N Hip Belt N
removable Sternum Strap Y
Inside
14in Laptop 16in
3 Main Compartments 3
N Organizer Y
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder N
Y Water Resistant Y
Material
420 VELOCITY CORDURA re/cor RN661680D CORDURA® ballistic nylon exterior (bluesign® approved)

Aer Tech Pack 2

by Aer
Front facing view of the Aer Tech Pack 2
Capacity12 L
Weight0.8 kg
Dimensions45×31×8 cm
Airline fit95%
Price$125

Key differences between the Black Ember Citadel 18 and Aer Tech Pack 2

Both have: passport pocket, luggage passthrough, backpack straps, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 179 accept both. 1 accept only the Black Ember Citadel 18, and 0 accept only the Aer Tech Pack 2.

Only the Black Ember Citadel 18 fits

Air Niugini.

Black Ember Citadel 18 vs. Aer Tech Pack 2: which should you pack?

The Black Ember Citadel 18 carries 6L more than the Aer Tech Pack 2 (18L vs. 12L), while the Aer Tech Pack 2 is the lighter pack at 0.8kg (vs. 1.3kg). For carry-on flexibility, the Black Ember Citadel 18 fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Black Ember Citadel 18; if you want to travel lighter, the Aer Tech Pack 2 is the better call.