CODEOFBELL X-PAK EVO Sling Pack (L) Review

The CODEOFBELL X-PAK EVO Sling Pack (L) feels like it was designed by gear enthusiasts for other gear enthusiasts. Between the expandable design and highly technical materials, a lot is happening here. At first glance, it almost feels more like a concept bag than something intended for everyday use. However, after testing it, we found that the design offers far more practicality than you might initially expect.

The X-PAK EVO starts at 11 liters in its compressed form, which already makes it fairly large for a sling. Once expanded, it jumps to 23 liters. That’s well into backpack territory, and it completely changes how this bag functions.

The big question is whether all those features actually translate into usable functionality—or whether they just create unnecessary complexity. After testing, we think the answer lands somewhere in the middle. There’s absolutely a learning curve here, but once you understand how the bag works, it becomes surprisingly capable.

External Components

CODEOFBELL uses a mix of X-Pac and CORDURA® re/cor recycled nylon throughout the X-PAK EVO, and the combination works really well. The X-Pac on the front panel adds structure, weather resistance, and that signature technical look, while the recycled CORDURA® nylon helps keep the rest of the bag durable and structured without feeling overly boxy. Together, they create a nice balance between durability, flexibility, and weather resistance.

The materials feel extremely confidence-inspiring in hand. This is the kind of sling you could comfortably use for daily commuting, travel, or rougher outdoor use without babying it. It has a premium feel throughout, and the construction backs that up.

YKK zippers are used across the pack, which is exactly what we want to see on a bag this technical. They’re smooth, easy to operate, and feel durable enough to handle years of abuse. Many of the zippers are water-resistant, which pairs nicely with the weather-resistant fabrics. The Hypalon zipper pulls are another nice touch. They’re easy to grab, even with wet hands or gloves, and they add to the bag’s overall premium feel.

Hardware throughout comes from Woojin, and everything works exactly as intended. The buckles feel durable, the adjusters hold securely, and nothing feels flimsy or underbuilt. There’s also a FIDLOCK fastener on the shoulder strap. If you haven’t used a FIDLOCK buckle before, there’s a bit of an adjustment period. It operates differently from a traditional non-magnetic buckle, and it can feel slightly awkward at first. However, once you get used to it, it works very well and becomes second nature.

One of the defining external features is the abundance of attachment loops spread throughout the bag. You can clip accessories, attach pouches, secure a Bluetooth speaker, or lash extra gear externally. It gives the sling a very modular feel, and visually, it definitely leans into the technical aesthetic. Thankfully, if you don’t use the attachment points, they stay relatively unobtrusive and don’t get in the way.

The front compression straps are another standout feature. They help compress the bag when it isn’t fully loaded, though they’re also tied directly into the bag’s expansion system. You can configure them traditionally with two parallel straps or cross them into an “X” pattern across the front. Functionally, both setups work well, and aesthetically, we dig both looks.

There’s a single water bottle pocket along one side of the sling. It’s fairly tight, though the stretchy material allows it to expand slightly when needed. Larger bottles can be a squeeze, but we had no issue fitting a 21-ounce Hydro Flask comfortably during testing. It also works nicely for a compact travel umbrella or a small travel tripod.

Along the side, there’s a removable padded handle attached to the exterior loops. The handle itself is well cushioned and comfortable to grab, and because it’s removable and repositionable, you can place it wherever it feels most natural for your carry style.

Overall, the exterior of the X-PAK EVO feels incredibly well thought-out. A lot is happening here, but most of it serves a functional purpose. It’s highly technical, highly durable, and very weather resistant, though it definitely leans more toward enthusiast-level design than straightforward simplicity.

Fit Notes

The back panel on the X-PAK EVO is excellent. There’s thick, dense cushioning throughout that almost feels like memory foam when pressed. It has a very supportive feel against the body without becoming overly stiff or bulky. During testing, it remained comfortable even with the bag heavily loaded. CORDURA® provides strong structural support, so there’s plenty of backbone.

Running down the center of the back panel is an unpadded channel to help improve airflow. It’s a simple addition, but it does help reduce heat buildup on hot days.

The shoulder strap is also very comfortable, though it uses a different padding style than the back panel. Instead of the denser foam-like feel, the strap uses breathable mesh with larger ventilation holes underneath. It still offers plenty of cushioning, but the focus here is on airflow and comfort during extended wear. For a bag that can expand to 23 liters, we’re glad CODEOFBELL didn’t skimp on strap comfort.

Another nice feature is the ambidextrous strap attachment system. You can swap which side the strap attaches to at the bottom of the bag, allowing you to wear it over either shoulder, depending on personal preference. That flexibility is nice to have, especially for a sling this substantial.

A detachable stabilizer strap is included. On smaller slings, stabilizer straps can sometimes feel unnecessary, but here they make a lot of sense. Once expanded and loaded out, this bag can carry a surprising amount of weight, and the extra stability helps keep everything secure and comfortable while moving around.

At first glance, all of this padding and support might seem excessive for an 11-liter sling. However, it’s important to remember that the X-PAK EVO expands to 23 liters. At that size, the added support becomes very necessary. The nice side effect is that the sling feels extremely comfortable in its smaller 11-liter configuration as well, even if it feels a little extra.

Inside The Sling Pack

The organization inside the X-PAK EVO is extensive, and it can honestly feel overwhelming at first. There are pockets everywhere, multiple access points, and several compartments layered on top of each other. Once you learn the layout, though, the organization becomes very useful, but it can still be confusing to remember where everything is.

Starting externally, there are three small accessory pockets positioned around the bag—one on the top left, one on the top right, and one on the bottom right. None of them is especially large, but they work well for smaller gear like snacks, earbuds, charging cables, or other quick-access essentials. The top-left pocket also includes a key leash, a handy addition.

Inside the main body of the sling, there’s a padded tablet sleeve that fits large devices. We couldn’t fit a 13-inch computer here, but it works for most devices smaller than that. Seeing a dedicated compartment this large inside a sling is honestly pretty wild, but it works surprisingly well here. The sleeve is nicely padded and suspended off the bottom of the bag for extra protection.

There’s another tablet sleeve on the other side, separated from the first by a thin divider. We like to store a tablet in one and flatter items like books, papers, maps, or travel documents in the other.

Before reaching the expandable main compartment, there’s another large organizational compartment accessed through a zipper with dual heads that allow entry from either side of the bag. Inside, there’s a solid amount of organization, including a laptop sleeve for up to a 13-inch laptop. Additionally, there’s a padded phone pocket, two large mesh pockets, a medium-sized liner pocket, and two pen slots. There’s plenty of space for tech accessories, chargers, notebooks, and daily essentials.

Up top, there’s another small accessory pocket without any built-in organization. It works best for smaller flat items. Interestingly, this pocket is somewhat hidden unless you expand the sling, giving the bag a slightly cleaner appearance when compressed.

The expandable main compartment is where the X-PAK EVO really separates itself from most slings. You can access it through the primary large zipper, though it can feel a little awkward to find and use when the bag is compressed to 11 liters. Thankfully, there’s another large zipper along the bottom of the bag that provides an additional entry point, which helps significantly.

Inside the main compartment, organization is intentionally minimal. There’s just a single zippered pocket and a large open cavity for bulkier gear. This is where you’ll store larger items, such as a sweatshirt, a tech pouch, camera gear, packing cubes, or even an extra pair of travel shoes. This compartment is also where all the bag’s expansion happens, so how you pack it dramatically changes how the sling carries.

That expandable design is impressive, but it also introduces the biggest learning curve of the entire bag. The X-PAK EVO is not the kind of sling you immediately pick up and fully understand. Access points overlap, compartments layer together, and the expansion system takes time to get used to. Initially, it can honestly feel a little cumbersome.

However, after spending time with the bag, the system starts to make sense. Once you understand how everything interacts, using the bag becomes much more intuitive. For us, the payoff was worth the adjustment period. Still, this absolutely won’t be the right sling for everyone.