Aer Day Pack 3 vs. Black Ember Citadel 18
Two carry-on travel backpacks, compared spec for spec.
Feature by feature
| Aer Day Pack 3 | Feature | Black Ember Citadel 18 |
|---|---|---|
| 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 |
| Y | Sternum Strap | removable |
| Inside | ||
| 16in | Laptop | 14in |
| 3 | Main Compartments | 3 |
| N | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | N |
| Y | Water Resistant | Y |
| Material | |
| 1680D Cordura® ballistic nylon exterior (bluesign® approved) | 420 VELOCITY CORDURA re/cor RN66 |
Black Ember Citadel 18
| Capacity | 18 L |
| Weight | 1.3 kg |
| Dimensions | 43×29×16 cm |
| Airline fit | 95% |
| Price | $240 |
Key differences between the Aer Day Pack 3 and Black Ember Citadel 18
- Sternum strap: Yes on the Aer Day Pack 3; Removable on the Black Ember Citadel 18.
- Laptop sleeve: 16in on the Aer Day Pack 3; 14in on the Black Ember Citadel 18.
- Water bottle pockets: 1, side on the Aer Day Pack 3; No on the Black Ember Citadel 18.
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. 180 accept both. Every airline that takes one takes the other.
Aer Day Pack 3 vs. Black Ember Citadel 18: which should you pack?
The Black Ember Citadel 18 carries 4L more than the Aer Day Pack 3 (14L vs. 18L), while the Aer Day Pack 3 is the lighter pack at 1.3kg (vs. 1.3kg). For carry-on flexibility, the Aer Day Pack 3 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 Day Pack 3 is the better call.