Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs. Solgaard Atlas Rolltop Backpack
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 | Solgaard Atlas Rolltop Backpack |
|---|---|---|
| Storage | ||
| 2 | Compression | 2 |
| None | Expanded Capacity | 31L |
| 1 | Opening | 1 |
| front | Passport | top, back |
| Y | Passthrough | Y |
| Carry | ||
| Y | Backpack | Y |
| optional | Hip Belt | optional, removable |
| removable | Sternum Strap | Y |
| Inside | ||
| 16in | Laptop | 16in |
| 5 | Main Compartments | 6 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |
| Material | |
| Available in: X-Pac X42, 500D, 630D HD | Shore-Tex |
Solgaard Atlas Rolltop Backpack
| Capacity | 27 L |
| Weight | 1.7 kg |
| Dimensions | 48×31×18 cm |
| Airline fit | 92% |
| Price | $275 |
Key differences between the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack and Solgaard Atlas Rolltop Backpack
- Passport pocket: Front on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; Top, back on the Solgaard Atlas Rolltop Backpack.
- Hip belt: Optional on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; Optional, removable on the Solgaard Atlas Rolltop Backpack.
- Sternum strap: Removable on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; Yes on the Solgaard Atlas Rolltop Backpack.
- Main compartments: 5 on the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack; 6 on the Solgaard Atlas Rolltop Backpack.
Both have: compression straps, luggage passthrough, backpack straps, laptop sleeve, built-in organizer, water bottle pockets, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 174 accept both. 1 accept only the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack, and 0 accept only the Solgaard Atlas Rolltop Backpack.
Only the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack fits
Air Niugini.
Alpha One-Niner SERT, PENUMBRA 2.0 Backpack vs. Solgaard Atlas Rolltop Backpack: which should you pack?
The Solgaard Atlas Rolltop Backpack carries 6L more than the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack (21L vs. 27L), while the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack is the lighter pack at 1.5kg (vs. 1.7kg). 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 Solgaard Atlas Rolltop Backpack; if you want to travel lighter, the Alpha One-Niner SERT, PENUMBRA 2.0 Backpack is the better call.