TOM BIHN Adept Roll-Top Backpack Review

At first glance, the TOM BIHN Adept Roll-Top Backpack is relatively simple, with a few exterior pockets, a laptop compartment, and the brand’s familiar hardware and attachment points. But after testing it for a week, we found that the Adept has a bit more going on than its understated exterior suggests. It’s designed to bridge the gap between an everyday carry backpack and a travel pack, with a 23.6-liter capacity when rolled down and up to 26.5 liters when fully expanded. That extra room is useful when you’re packing for a weekend, while the smaller configuration keeps the bag from feeling unnecessarily large during everyday use. TOM BIHN describes it as an evolution of the Addax, and the changes here are more than a simple refresh.

The biggest change is the horseshoe-style opening on the front of the main compartment. Rolltop bags are great when you want flexible capacity, but they can be frustrating when something you need is buried at the bottom. The Adept addresses that problem by providing a second entry point to the main compartment, so we can keep the rolltop closed while still accessing our gear. That feature ended up being one of our favorite things about the bag. There are also load lifters, a breathable skeleton-style back panel, a full-length side pocket, a hidden quick-access pocket, four O-rings, and a suspended laptop compartment. On paper, that makes the Adept sound fairly feature-packed, but in practice, the design still feels relatively clean. It’s a thoughtful combination of flexibility and organization, though packing the upper portion of the bag takes some consideration if we want the best carry.

External Components

The TOM BIHN Adept Roll-Top Backpack has a fairly understated exterior, especially compared with some of the brand’s more organization-heavy bags. Our Ballistic version uses 630D high-tenacity 2×2 ballistic nylon on the exterior with a 200D Halcyon liner, both of which are bluesign® certified. TOM BIHN also offers a lighter Spectron version, which uses 420D UHMWPE/nylon Spectron ripstop and weighs about 2 pounds, 4.2 ounces compared with 2 pounds, 9.6 ounces for the Ballistic version. The bag measures 12.6 by 18.3 by 8.9 inches (32 x 46.5 x 22.6 cm), so it has a reasonably compact footprint for something that can stretch to 26.5 liters. Yes, they’re fairly transparent about specs and manufacturing, too (the bag is made in Seattle, Washington).

There’s a lot to like about the exterior organization. The full-length side pocket is particularly useful because it’s tall enough to accommodate awkward, flatter items that don’t necessarily belong in a traditional quick-access pocket. We used it for things like glasses cases, toiletries, and other everyday items that we wanted nearby. There’s also a recessed front zippered pocket with another zippered pocket inside, giving us two layers of organization without making the front of the bag look overly complicated. The hidden side pocket works well for smaller items that we want to keep close without exposing them to the rest of the bag. The exterior water bottle pocket is made to accommodate most 32-ounce bottles, but smaller bottles still fit securely inside thanks to the stretchy construction.

TOM BIHN uses its familiar zipper hardware throughout, including water-repellent #8 YKK racquet-coil zippers on the exterior. The zipper pulls can make a little noise as they knock against each other, which is something we’ve noticed on other TOM BIHN bags, but it’s more of a quirk than a serious issue. The bag also includes Pull Du Jour sets that can be added to the zipper pulls if that’s your preference. There’s a padded grab handle at the top, while a luggage pass-through on the back lets us slide the Adept onto rolling luggage.

The harness system is relatively simple, but TOM BIHN made some important improvements here. We get load lifters, a sternum strap, flexible edgeless shoulder straps, and a gatekeeper-clipped hip belt. The load lifters are particularly noteworthy because they help pull the upper portion of the bag toward your body when it’s fully loaded. That’s useful on a bag with a rolltop, where the expanded upper section can otherwise sit farther away from your back. TOM BIHN specifically designed these load lifters to improve balance and comfort under heavier loads.

The back panel combines closed-cell foam, spacer mesh, and ballistic nylon, creating what TOM BIHN calls a breathable skeleton back panel. We found it comfortable, and there’s enough structure to keep the bag from simply collapsing against your back. However, the airflow is more noticeable around the upper portion than the lower portion. If you tend to build up heat around your lower back, you may still notice some warmth during longer carries. The shoulder straps themselves are comfortable and flexible, using half-inch EV50 foam, and the included hip belt provides some additional stability even though it doesn’t transfer a substantial amount of weight to the hips.

For those who want more support, TOM BIHN sells a separately available 1-inch padded hip belt. There’s also an optional frame sheet that adds more structure and stiffness. We don’t think either is essential for everyone, but they give the Adept some additional flexibility if you tend to carry heavier loads or simply prefer a more structured pack.

Fit Notes

On medium-sized builds, we found the Adept sat somewhat low on the back, which isn’t particularly surprising given its overall size and shape. The load lifters helped significantly with bringing the weight forward, and the sternum strap kept the shoulder straps comfortably positioned. Without the sternum strap, the harness sits a little wider, but it remains comfortable. The included hip belt is more about stability than load transfer. You can remove it entirely, or simply buckle it behind your back when you don’t want to use it, and it stays out of the way. For everyday loads, that was more than enough support for us.

Where the fit gets more interesting is when we start using the full capacity. The Adept is slightly tapered, helping keep the load relatively centralized, but the upper portion widens as we extend the rolltop. That means where we put our heavier gear matters. We learned this the hard way when packing for a weekend. After filling the bag, taking advantage of the extra rolltop space, we decided to squeeze in another pair of shoes. That was enough to make the bag pull back noticeably. The load lifters helped, but they couldn’t completely compensate for poor weight distribution. Thankfully, the horseshoe opening lets us get inside and rearrange things without unpacking the entire bag. That’s a big advantage, especially when traveling.

Inside The Backpack

The Adept’s interior is where the design really starts to make sense. The rolltop offers variable capacity, while the horseshoe zipper provides access to the main compartment without opening the rolltop. TOM BIHN specifically designed the horseshoe opening to solve one of the classic problems with rolltop bags: getting at something at the bottom means digging through everything above it once everything is packed. With the Adept, we can open the front and see what’s inside much more easily.

Inside the rolltop is a zippered mesh pocket that works well for smaller clothing and accessories. We used it for a hat, socks, and underwear over a weekend trip. The main compartment is relatively open, giving us plenty of flexibility for packing cubes, a toiletry kit, a jacket, shoes, or larger everyday items. We were able to fit two packing cubes, a toiletry bag, a packable jacket, and a TOM BIHN case while still experimenting with where an extra pair of shoes could fit. The capacity is flexible enough that the same bag can feel relatively compact during a normal day and expand when we need to carry more.

The rolltop closure uses a central magnetic buckle with a quick-release button, along with three snaps that help keep the rolled section secured. We like the central buckle because it’s simple to operate and avoids the need to line up multiple side-release buckles. Even when the bag is fully extended, we still need to secure the rolltop, but the closure is quick enough that it isn’t much of a hassle. TOM BIHN includes a small lip beneath the snaps, which gives you somewhere to brace your finger when reconnecting them.

There’s also an open-top device pocket designed for most 13-inch devices, along with four O-rings and Cache attachment loops. The O-rings are spread throughout the bag, allowing us to connect TOM BIHN pouches and accessories wherever they make the most sense. That modularity is one of the brand’s signatures, and it works particularly well here because the main compartment itself is intentionally open. We can add organization when necessary without permanently dividing up the interior.

The laptop compartment sits on the back and has its own exterior access. TOM BIHN says it fits most 16-inch laptops and suspends the device above the bottom of the bag. In practice, however, larger laptops can be somewhat awkward to get in and out of because of how the compartment opens. A 13 or 14-inch laptop feels like a more natural match, although a 16-inch device can fit if you’re willing to work around the opening. The padding is reassuring, but the bottom clearance is relatively modest from our testing perspective, so we’re still mindful of how we handle the bag when setting it down.

One of our favorite details is the black piping around the top of the main compartment. Beyond adding some structure, it gives us a visual reference for how high we can pack the bag while still getting a full roll. That’s a small detail, but it’s exactly the sort of thing that makes the Adept feel thoughtfully designed. TOM BIHN’s own description of the bag emphasizes improving the Addax based on real-world use, including better weight distribution, a more intuitive closure, and another access point, and those decisions are apparent when packing the Adept.

The biggest thing to remember is that the expandable capacity is both a benefit and a responsibility. It’s tempting to see that extra space and immediately fill it, but the higher the load sits, the more important weight distribution becomes. When packed thoughtfully, the Adept carries comfortably and gives us plenty of room. When we simply stuff the extra space with whatever we have left, the load can start pulling backward. The horseshoe opening makes it easier to correct that problem, but it’s still better to pack intentionally from the beginning.