Travel Backpacks
Air City Pack Pro 2 (20L): A Compact Personal-Item Backpack for Short Trips
The smallest City Pack Pro 2 works as a tech-centered daily backpack and doubles as an airline personal item for short trips. Here is what fits inside after a real 4-day test.
Introduction
The Air City Pack Pro 2 in its new 20-liter size is the smallest version of the City Pack Pro line, and it is built around a simple idea: one bag that works as a tech-centered daily backpack and, when needed, as an airline personal item. On a short four-day trip to Las Vegas, it fit under the seat perfectly as a personal item, which is exactly the role this size is aiming for.
The bag shares its core design with the updated Travel Pack 35 and the original 24-liter City Pack Pro, differing mainly in size and a few small design details. If you already know that family of bags, the 20L will feel familiar. If you do not, the short version is that it pairs generous small-gear organization with a full-opening main panel, so you can use it both ways without compromise.

What the 20L Changes
Compared with the 24-liter version, there are not a lot of updates, but a few are worth knowing about. The biggest change is that one of the side pockets has been removed and replaced with a small zipper pocket, and the little key chain has moved over to the other side. There is also a very minor update to the top carry handle: instead of the padding running all the way to the edge, it is crimped off, leaving the handle a little looser and, arguably, slightly easier to carry.
Beyond those tweaks, the defining change is simply the size. At 20 liters, this is the smallest version of the City Pack Pro 2 available, and that smaller footprint is what makes it viable as a personal item for short trips like this one.

Packing Test: What Fits for Four Days
The front pockets are the surprise here. They are quite a bit larger than they look and hold more than you would expect, which matters because the main compartment has limited capacity. Centering bulkier tech gear in these pockets frees up the interior for clothes.
In the larger bottom pocket, that meant a toiletry bag, a small Matador pill bottle, a battery, and headphones. The top pocket swallowed other bulky electronics that were wanted within easy reach: a charger with its cord, a small action cam, and the tripod and camera from a DJI gimbal.

Main Compartment and Camera Gear
Inside the main compartment, a packing cube held all clothing for the trip except what was being worn: three sets for four days, consisting of one button-up t-shirt, one pair of pants, three t-shirts, three pairs of underwear, and three pairs of socks. Camera gear, including a Sony a7C and a microphone, packed into a small dedicated cube, and a tripod went into the corner of the bag.
The tripod used was a Ulanzi FotoPro carbon fiber model, which packs down small and travels well. One practical note: the tripod head was a little too long to fit in the 20L, so it had to be unscrewed and tucked into the small space below. Aside from that, everything fit perfectly.
A 14-inch laptop and a mouse pad went into the back laptop sleeves, sunglasses into the small top slash pocket, and a water bottle was clipped to the external loop with a small Nite Ize carabiner tucked in the outside pocket.
Things to Consider Before Buying
The main complaint with this bag is the side water bottle pockets. They are really small, and losing one of them to the new zipper pocket does not help. With a small bag like this, a bit of extra external space is genuinely useful, and a second side pocket probably would have been enough to hold the tripod. As they are, the bottle pockets are limited to very small items or small water bottles.

It is also worth noting that the full-opening main panel, while great for packing, means the interior capacity is modest. Travelers who routinely carry more than a few days of clothes, bulkier camera bodies, or large lenses will likely be happier with the 24-liter or 35-liter versions of the same design.
Buying Advice
Choose the 20-liter Air City Pack Pro 2 if your primary use case is a tech-heavy daily bag that occasionally needs to fly as a personal item. It shines when most of what you carry is small gear: chargers, cameras, headphones, and a couple of days of clothing. If you lean more on water bottles or bulky external storage, the smaller pockets are the trade-off to weigh before buying.
Conclusion
The Air City Pack Pro 2 (20L) is a thoughtful smallest-size addition to the City Pack Pro family. It proved itself on a real four-day trip as a personal item, fitting clothes, a full camera kit, a tripod, and a pile of tech accessories without strain. The reduced side storage is the one clear drawback, but for anyone wanting a compact, well-organized bag for short trips, it is an easy recommendation.
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