Patagonia Black Hole MLC Wheeled Duffel 34L vs. The Brown Buffalo Conceal Pack 21L

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

Patagonia Black Hole MLC Wheeled Duffel 34L

Capacity34 L
Weight2.9 kg
Dimensions52×33×20 cm
Airline fit88%
Price$360

Feature by feature

Patagonia Black Hole MLC Wheeled Duffel 34LFeatureThe Brown Buffalo Conceal Pack 21L
Storage
N Compression N
None Expanded Capacity None
1 Opening 1
front Passport front
N Passthrough Y
Carry
hideable Backpack Y
N Hip Belt N
removable Sternum Strap removable
Inside
N Laptop 15in
2 Main Compartments 2
N Organizer N
Outside
× Hard Shell ×
N Rain-fly N
N Water Bottle Holder N
Y Water Resistant Y
Material
8.7-oz 300-denier 100% postconsumer recycled polyester ripstop with a postindustrial recycled TPU-film laminateChallenge® Sailcloth EPX400

The Brown Buffalo Conceal Pack 21L

Front facing view of the The Brown Buffalo Conceal Pack 21L
Capacity21 L
Weight1.3 kg
Dimensions50×30×15 cm
Airline fit92%
Price$325

Key differences between the Patagonia Black Hole MLC Wheeled Duffel 34L and The Brown Buffalo Conceal Pack 21L

Both have: passport pocket, sternum strap, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 167 accept both. 0 accept only the Patagonia Black Hole MLC Wheeled Duffel 34L, and 6 accept only the The Brown Buffalo Conceal Pack 21L.

Only the The Brown Buffalo Conceal Pack 21L fits

Air Niugini, Belavia, Etihad Airways, Oman Air, Qatar Airways, Royal Jordanian.

Patagonia Black Hole MLC Wheeled Duffel 34L vs. The Brown Buffalo Conceal Pack 21L: which should you pack?

The Patagonia Black Hole MLC Wheeled Duffel 34L carries 13L more than the The Brown Buffalo Conceal Pack 21L (34L vs. 21L), while the The Brown Buffalo Conceal Pack 21L is the lighter pack at 1.3kg (vs. 2.9kg). For carry-on flexibility, the The Brown Buffalo Conceal Pack 21L fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Patagonia Black Hole MLC Wheeled Duffel 34L; if you want to travel lighter, the The Brown Buffalo Conceal Pack 21L is the better call.