Attitude Supply ATD2 Backpack vs. The Brown Buffalo Conceal Pack 21L
Two carry-on travel backpacks, compared spec for spec.
Attitude Supply ATD2 Backpack
| Capacity | 18 L |
| Weight | 1.3 kg |
| Dimensions | 45×25×19 cm |
| Airline fit | 96% |
| Price | $475 |
Feature by feature
| Attitude Supply ATD2 Backpack | Feature | The Brown Buffalo Conceal Pack 21L |
|---|---|---|
| Storage | ||
| 4 | Compression | N |
| 31L | Expanded Capacity | None |
| 1 | Opening | 1 |
| front | Passport | front |
| Y | Passthrough | Y |
| Carry | ||
| removable | Backpack | Y |
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside | ||
| 15in | Laptop | 15in |
| 2 | Main Compartments | 2 |
| Y | Organizer | N |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | N |
| Y | Water Resistant | Y |
| Material | |
| Challenge Sailcloth Ecopak® EPLX600 | Challenge® Sailcloth EPX400 |
The Brown Buffalo Conceal Pack 21L
| Capacity | 21 L |
| Weight | 1.3 kg |
| Dimensions | 50×30×15 cm |
| Airline fit | 92% |
| Price | $325 |
Key differences between the Attitude Supply ATD2 Backpack and The Brown Buffalo Conceal Pack 21L
- Compression straps: 4 on the Attitude Supply ATD2 Backpack; No on the The Brown Buffalo Conceal Pack 21L.
- Backpack straps: Removable on the Attitude Supply ATD2 Backpack; Yes on the The Brown Buffalo Conceal Pack 21L.
- Hip belt: Removable on the Attitude Supply ATD2 Backpack; No on the The Brown Buffalo Conceal Pack 21L.
- Built-in organizer: Yes on the Attitude Supply ATD2 Backpack; No on the The Brown Buffalo Conceal Pack 21L.
- Water bottle pockets: 2, side on the Attitude Supply ATD2 Backpack; No on the The Brown Buffalo Conceal Pack 21L.
Both have: passport pocket, luggage passthrough, sternum strap, laptop sleeve, 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. 8 accept only the Attitude Supply ATD2 Backpack, and 0 accept only the The Brown Buffalo Conceal Pack 21L.
Only the Attitude Supply ATD2 Backpack fits
Air Tahiti, American Eagle, easyJet, Great Lakes Airlines, Gulf Air, Ravn Alaska, Regional Express, Virgin Australia.
Attitude Supply ATD2 Backpack vs. The Brown Buffalo Conceal Pack 21L: which should you pack?
The The Brown Buffalo Conceal Pack 21L carries 3L more than the Attitude Supply ATD2 Backpack (18L vs. 21L), while the Attitude Supply ATD2 Backpack is the lighter pack at 1.3kg (vs. 1.3kg). For carry-on flexibility, the Attitude Supply ATD2 Backpack fits 96% 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 Attitude Supply ATD2 Backpack is the better call.