Ortlieb Messenger Bag vs. Atom Packs "Atom+"

Two carry-on travel backpacks, compared spec for spec.

Ortlieb Messenger Bag

Front facing view of the Ortlieb Messenger Bag
Capacity39 L
Weight1.3 kg
Dimensions50×39×15 cm
Airline fit59%
Price$140

Feature by feature

Ortlieb Messenger BagFeatureAtom Packs "Atom+"
Storage
N Compression N
None Expanded Capacity None
2 Opening 2
N Passport N
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt removable
removable Sternum Strap removable
Inside
N Laptop N
1 Main Compartments 1
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder 2
Y Water Resistant Y
Material
PD620, PS620C210d Robic

Atom Packs "Atom+"

Front facing view of the Atom Packs "Atom+"
Capacity50 L
Weight0 kg
Dimensions0×0×0 cm
Airline fit%
Price$242

Key differences between the Ortlieb Messenger Bag and Atom Packs "Atom+"

Both have: backpack straps, hip belt, sternum strap, water resistant.

Ortlieb Messenger Bag vs. Atom Packs "Atom+": which should you pack?

The Atom Packs "Atom+" carries 11L more than the Ortlieb Messenger Bag (39L vs. 50L), and the two are closely matched on weight. If you prioritise packing volume, choose the Atom Packs "Atom+"; if you want to travel lighter, the Ortlieb Messenger Bag is the better call.