Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs. Travel Pack 3
Two carry-on travel backpacks, compared spec for spec.
Alpha One-Niner SERT, PENUMBRA 2.0 Backpack
| Capacity | 21 L |
| Weight | 1.5 kg |
| Dimensions | 47×30×14 cm |
| Airline fit | 93% |
| Price | $255 |
Feature by feature
| Alpha One-Niner SERT, PENUMBRA 2.0 Backpack | Feature | Travel Pack 3 |
|---|---|---|
| Storage | ||
| 2 | Compression | Y |
| None | Expanded Capacity | None |
| 1 | Opening | 1 |
| front | Passport | top, side |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| optional | Hip Belt | optional |
| removable | Sternum Strap | removable |
| Inside | ||
| 16in | Laptop | 16in |
| 5 | Main Compartments | 5 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 1, side |
| Y | Water Resistant | Y |
| Material | |
| Available in: X-Pac X42, 500D, 630D HD | 1680D Cordura® ballistic nylon |
Key differences between the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack and Travel Pack 3
- Compression straps: 2 on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; Yes on the Travel Pack 3.
- Passport pocket: Front on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; Top, side on the Travel Pack 3.
- Water bottle pockets: 2, side on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; 1, side on the Travel Pack 3.
Both have: luggage passthrough, backpack straps, hip belt, sternum strap, laptop sleeve, built-in organizer, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 129 accept both. 46 accept only the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack, and 0 accept only the Travel Pack 3.
Only the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack fits
Air Baltic, Air China, Air Malta, Air Niugini, Air Serbia, Air Seychelles, Asiana Airlines, ATA Airlines, Belavia, Blue Air, Bulgaria Air, China Eastern, Emirates Airlines, Enter Air, Etihad Airways, flybe, Icelandair, InselAir, Juneyao Airlines, Liat Airlines, Luxair, Meridiana Fly, Nordwind Airlines, Oman Air, Pakistan International, Qatar Airways, Regional Express, Royal Brunei Airlines, Royal Jordanian, Ryanair, S7, Scoot, Shandong Airlines, Shenzhen Airlines, Sun Express, TAP Air Portugal, TAROM, Tianjin Airlines (A320 & E190), Tiger Airways, TUI, Ukraine International, VIM Airlines (Closed), Virgin Australia, Volotea, WestJet, Xiamen.
Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs. Travel Pack 3: which should you pack?
The Travel Pack 3 carries 14L more than the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack (21L vs. 35L), while the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack is the lighter pack at 1.5kg (vs. 1.9kg). For carry-on flexibility, the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Travel Pack 3; if you want to travel lighter, the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack is the better call.