Adventurist Backpack Co. Carry On Duffel/Backpack 45L Review

The Adventurist Backpack Co. Carry On Duffel/Backpack 45L sits in a familiar but tricky category: the duffle-backpack hybrid designed to maximize packing space while offering multiple carry modes. At first glance, it presents itself as a highly adaptable travel companion that can shift between backpack, crossbody, and duffle configurations depending on the situation. In practice, though, those trade-offs become more apparent the longer we spend with it.

Over the course of testing, we’ve taken this bag through flights, airport transfers, and multi-day travel scenarios to understand where it thrives and where it struggles. While it offers impressive capacity, solid material durability, and a highly flexible packing experience, its weaknesses become clear in structure and carry comfort. This is a bag that prioritizes what you can carry more than how comfortably you can carry it.

External Components

On the outside, the Adventurist Backpack Co. Carry On Duffel/Backpack 45L uses a 1000D water-resistant polyester that immediately communicates durability. The fabric feels thick and resilient to the touch, yet retains a surprising amount of flexibility. That flexibility is both a strength and a limitation: while it allows the bag to expand and accommodate overpacking, it also means the bag loses its shape very easily. When fully loaded, it tends to look soft, uneven, and somewhat slouchy rather than structured or rigid.

Despite that lack of structure, the materials are reliable, resilient, and ready for day-to-day use. After multiple flights—both checked and carried on—the exterior shows minimal signs of wear. There are a few loose threads here and there, but these appear to be remnants of manufacturing rather than actual damage. We don’t have durability concerns with the shell material itself, especially for typical travel use.

The hardware complements this durability. The bag uses YKK zippers throughout, which glide smoothly and feel dependable in daily use. The zipper pulls are made of paracord-style cordage with small plastic ends, making them easy to grab even when the bag is fully packed or when you’re rushing through airport transitions. Buckles are unbranded but functional, holding straps securely without slipping during use. We also see D-rings placed around the exterior, which play a key role in the bag’s carry versatility.

One of the defining features of this bag is its three-way carry system. There’s a top grab handle for duffle-style carry, a removable shoulder or crossbody strap, and a set of stowable backpack straps that tuck into a rear compartment when not in use. Switching between these modes is straightforward, and we appreciate how quickly you can move from backpack to shoulder carry depending on your environment.

The duffle carry handles themselves are made with a vegan leather-style material that feels comfortable enough for short hauls but becomes less practical under heavier loads. Because the bag lacks internal structure, the weight distribution tends to shift around, causing the handles to pull unevenly. This becomes more noticeable the more you pack into it.

The crossbody strap is the most frequently used of the three configurations in get-up-and-go places like airports. It offers quick, informal carry and allows for easy repositioning of the bag when moving through security or boarding queues. However, like the rest of the harness system, padding is minimal. While serviceable for short periods, it is not designed for long-term load bearing.

The backpack straps are stored in a rear compartment and deploy quickly. This is one of the better design decisions in the bag, as the transition is simple and intuitive. Once attached, however, the limitations become obvious. The straps are relatively thin and lightly padded, which feels underbuilt for a 45-liter load. There is a sternum strap that helps stabilize the load, but it ends up doing a lot of the work in keeping the bag from pulling backward.

Adjustability is another area where the harness system struggles. The strap adjustment mechanism is not particularly intuitive on the move, making quick tightening or loosening awkward when the bag is already on your back. Combined with the soft structure of the bag, this creates a carry experience that feels less refined than more structured travel backpacks in the same volume class.

Fit Notes

When we loaded the Adventurist Backpack Co. Carry On Duffel/Backpack 45L, the first thing we noticed was how much the bag’s flexibility affects fitment. Because the structure is soft, the pack conforms to the contents rather than forcing them into a fixed shape. This creates a carry experience that changes significantly depending on how you pack it. A tightly packed load feels more stable, while a loosely packed one tends to shift and sag.

At 45 liters, the bag naturally sits large on the body, and that becomes especially noticeable on a smaller frame. The lack of rigid structure means the weight sits closer to the body in some areas and pulls away in others, creating an uneven feel during movement. The sternum strap helps reduce the backward pull, but it cannot fully compensate for the minimal padding and soft frame. Over longer periods, this leads to fatigue, particularly around the shoulders and neck area.

Fit also changes depending on which carry mode we use. In backpack mode, the load feels most secure, but also the most physically demanding. In crossbody or shoulder carry, the weight is easier to manage in short bursts, but it becomes less stable as the bag shifts with movement. Duffel carry is the least comfortable for anything beyond brief handling, as the weight distribution becomes entirely dependent on grip strength and arm positioning.

Ultimately, the fit experience reflects the bag’s core identity: it is designed to be flexible and adaptable, but not necessarily optimized for ergonomic comfort over long durations.

Inside The Duffel/Backpack

Inside the Adventurist Backpack Co. Carry On Duffel/Backpack 45L, the focus is clearly on maximizing usable space rather than enforcing strict organization. The main compartment opens in a clamshell-style duffle layout, giving full access to the interior. This wide opening is one of the bag’s strongest features, making packing and unpacking straightforward even when the bag is fully loaded.

We tested the interior with a mix of travel clothing, shoes, accessories, and miscellaneous gear spread across approximately a week’s worth of travel. Even with a relatively generous load, the bag still had additional space to spare, reinforcing its true capacity advantage. Because of the soft-sided build, it can also stretch beyond its nominal 45 liters, though this may create issues when dealing with strict airline size enforcement.

A removable divider panel sits inside the main compartment and plays an important role in structure. When installed, it helps the bag hold its shape better and creates a more organized packing layout. When removed, the interior becomes one large open cavity, allowing for bulkier items but reducing overall structure. We found ourselves preferring the divider when carrying structured loads, and removing it only when packing irregularly shaped gear.

Internal organization comes in the form of multiple zippered compartments and mesh pockets along the interior walls. These are useful for separating clothing categories, accessories, or travel essentials like socks and undergarments—that is, if you’re not into packing cubes and organizers. The pockets are generally well-sized, though they function best with flatter items. Bulkier gear tends to distort the pocket shape slightly due to the bag’s soft structure.

There is also a laptop storage area integrated into the design, but this is where usability becomes more complicated. The designated compartment is tight and awkward for larger devices, particularly 15 to 16-inch laptops. We found that placing a laptop in the rear panel area instead offered a more practical solution, even though it lacks a dedicated false bottom for impact protection. This is one of the weaker aspects of the interior design, as it forces users to improvise depending on their tech setup.

A side water bottle pocket is included, but it becomes less functional when the main compartment is fully packed. The flexible body of the bag pushes into this pocket from the inside, making it difficult to insert or remove bottles smoothly. In practice, we found ourselves repurposing this pocket for miscellaneous items instead of hydration. As for everyday accessories, there is also a top pocket spanning the bag’s entire width. It’s more like a zippered top shelf than a dump pocket, so ergonomics is more attuned for duffle-style carry than in backpack mode.

Overall, the interior excels in volume and flexibility but falls short in refined compartment design for tech and structured accessories.