Knack Bags Medium Expandable Knack Pack v2 vs. Alpha One-Niner Whitley Backpack
Two carry-on travel backpacks, compared spec for spec.
Knack Bags Medium Expandable Knack Pack v2
| Capacity | 24 L |
| Weight | 1.4 kg |
| Dimensions | 48×31×11 cm |
| Airline fit | 92% |
| Price | $265 |
Feature by feature
| Knack Bags Medium Expandable Knack Pack v2 | Feature | Alpha One-Niner Whitley Backpack |
|---|---|---|
| Storage | ||
| N | Compression | N |
| 35L | Expanded Capacity | None |
| 1 | Opening | 1 |
| front | Passport | front |
| N | Passthrough | N |
| Carry | ||
| hideable | Backpack | Y |
| N | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside | ||
| 16in | Laptop | 16in |
| 3 | Main Compartments | 3 |
| N | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 1, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |
| Material | |
| PU coated 420 denier, high-density nylon | Available in:X-Pac X42, 500D, 1050D Ballistic Nylon |
Alpha One-Niner Whitley Backpack
| Capacity | 20 L |
| Weight | 1.2 kg |
| Dimensions | 47×28×15 cm |
| Airline fit | 93% |
| Price | $200 |
Key differences between the Knack Bags Medium Expandable Knack Pack v2 and Alpha One-Niner Whitley Backpack
- Backpack straps: Hideable on the Knack Bags Medium Expandable Knack Pack v2; Yes on the Alpha One-Niner Whitley Backpack.
- Built-in organizer: No on the Knack Bags Medium Expandable Knack Pack v2; Yes on the Alpha One-Niner Whitley Backpack.
- Water bottle pockets: 1, side on the Knack Bags Medium Expandable Knack Pack v2; 2, side on the Alpha One-Niner Whitley Backpack.
Both have: passport pocket, 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. 174 accept both. 0 accept only the Knack Bags Medium Expandable Knack Pack v2, and 2 accept only the Alpha One-Niner Whitley Backpack.
Only the Alpha One-Niner Whitley Backpack fits
Air Niugini, Great Lakes Airlines.
Knack Bags Medium Expandable Knack Pack v2 vs. Alpha One-Niner Whitley Backpack: which should you pack?
The Knack Bags Medium Expandable Knack Pack v2 carries 4L more than the Alpha One-Niner Whitley Backpack (24L vs. 20L), while the Alpha One-Niner Whitley Backpack is the lighter pack at 1.2kg (vs. 1.4kg). For carry-on flexibility, the Alpha One-Niner Whitley Backpack fits 93% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Knack Bags Medium Expandable Knack Pack v2; if you want to travel lighter, the Alpha One-Niner Whitley Backpack is the better call.