The Brown Buffalo Conceal Pack 21L vs. Black Ember Citadel 18

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

The Brown Buffalo Conceal Pack 21L

Front facing view of the The Brown Buffalo Conceal Pack 21L
Capacity21 L
Weight1.3 kg
Dimensions50×30×15 cm
Airline fit92%
Price$325

Feature by feature

The Brown Buffalo Conceal Pack 21LFeatureBlack Ember Citadel 18
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
front Passport top
Y Passthrough Y
Carry
Y Backpack Y
N Hip Belt N
removable Sternum Strap removable
Inside
15in Laptop 14in
2 Main Compartments 3
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder N
Y Water Resistant Y
Material
Challenge® Sailcloth EPX400420 VELOCITY CORDURA re/cor RN66

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

Key differences between the The Brown Buffalo Conceal Pack 21L and Black Ember Citadel 18

Both have: luggage passthrough, backpack straps, sternum strap, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 173 accept both. 0 accept only the The Brown Buffalo Conceal Pack 21L, and 7 accept only the Black Ember Citadel 18.

Only the Black Ember Citadel 18 fits

Air Tahiti, American Eagle, easyJet, Gulf Air, Ravn Alaska, Regional Express, Virgin Australia.

The Brown Buffalo Conceal Pack 21L vs. Black Ember Citadel 18: which should you pack?

The The Brown Buffalo Conceal Pack 21L carries 3L more than the Black Ember Citadel 18 (21L vs. 18L), while the The Brown Buffalo Conceal Pack 21L is the lighter pack at 1.3kg (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 The Brown Buffalo Conceal Pack 21L; if you want to travel lighter, the The Brown Buffalo Conceal Pack 21L is the better call.