Mountainsmith Divide EVO Daypack vs. Alpha One-Niner Whitley Backpack
Two carry-on travel backpacks, compared spec for spec.
Mountainsmith Divide EVO Daypack
| Capacity | 16 L |
| Weight | 0.7 kg |
| Dimensions | 44×29×15 cm |
| Airline fit | 95% |
| Price | $130 |
Feature by feature
| Mountainsmith Divide EVO Daypack | Feature | Alpha One-Niner Whitley Backpack |
|---|---|---|
| Storage | ||
| N | Compression | N |
| None | Expanded Capacity | None |
| 0 | Opening | 1 |
| front | Passport | front |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| N | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside | ||
| 15in | Laptop | 16in |
| 3 | Main Compartments | 3 |
| N | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |
| Material | |
| 500d Nylon Cordura | 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 Mountainsmith Divide EVO Daypack and Alpha One-Niner Whitley Backpack
- Opening: Other on the Mountainsmith Divide EVO Daypack; Clamshell on the Alpha One-Niner Whitley Backpack.
- Laptop sleeve: 15in on the Mountainsmith Divide EVO Daypack; 16in on the Alpha One-Niner Whitley Backpack.
- Built-in organizer: No on the Mountainsmith Divide EVO Daypack; Yes on the Alpha One-Niner Whitley Backpack.
Both have: passport pocket, backpack straps, sternum strap, 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. 175 accept both. 5 accept only the Mountainsmith Divide EVO Daypack, and 1 accept only the Alpha One-Niner Whitley Backpack.
Only the Mountainsmith Divide EVO Daypack fits
Air Tahiti, American Eagle, easyJet, Gulf Air, Ravn Alaska.
Only the Alpha One-Niner Whitley Backpack fits
Great Lakes Airlines.
Mountainsmith Divide EVO Daypack vs. Alpha One-Niner Whitley Backpack: which should you pack?
The Alpha One-Niner Whitley Backpack carries 4L more than the Mountainsmith Divide EVO Daypack (16L vs. 20L), while the Mountainsmith Divide EVO Daypack is the lighter pack at 0.7kg (vs. 1.2kg). For carry-on flexibility, the Mountainsmith Divide EVO Daypack fits 95% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Alpha One-Niner Whitley Backpack; if you want to travel lighter, the Mountainsmith Divide EVO Daypack is the better call.