YETI Skala 40L Backpack Review

The YETI Skala 40L Backpack is a 40-liter hiking pack with a lightweight build, a highly adjustable harness system, and a design clearly influenced by YETI’s acquisition of Mystery Ranch. It’s got the bones of a serious backcountry hauler, but it doesn’t fully commit to the ultralight philosophy. Instead, it lands somewhere in between—a pack that wants to be light but refuses to skimp on comfort.

After testing around Detroit’s Belle Isle Park and cycling through the city, it’s clear this travel pack is more than capable in a variety of environments. The real question is whether it strikes the right balance between weight and performance—and, for the most part, it does.

External Components

The Skala 40L uses a combination of 420D HD Nylon and 210D Nylon Birdseye Dobby, which results in a fabric that feels impressively light in hand without sacrificing durability. It’s highly water-resistant, too—not fully waterproof, but more than capable of shrugging off light rain and splashes. For a hiking pack, that’s exactly what we want to see.

YKK zippers are used throughout, which is always a welcome sight. They’re coated with PU for added weather resistance, though that comes with a trade-off. They open slightly more slowly and are more resistant to opening than standard zippers. It’s not a dealbreaker, but if you’re used to ripping open a pack in one quick motion, you’ll notice the difference.

Duraflex hardware rounds things out, and, as expected, it’s rock-solid. The buckles snap into place with confidence, and everything feels built to last—no surprises here—in a good way.

Up top, there’s a minimalist handle. It’s thin, unpadded, and not particularly comfortable if you’re carrying the pack for any extended period. It can dig into your hand a bit, but given how lightweight it is, it’s hard to complain too much. This isn’t a briefcase-style carry bag anyway—it’s more of a grab-and-go or hang-it-up situation.

Around the exterior, you’ll find a generous number of attachment loops. These are clearly designed with hikers in mind—perfect for trekking poles, ice axes, or other trail gear. That said, they’re versatile enough to accommodate city use, too, depending on how creative you want to get.

Storage on the outside is more robust than it initially appears. There are technically two water bottle pockets—one on each side, but the stretchy 90D x 300D nylon/poly/spandex blend extends across the front of the pack, effectively giving you four flexible stash zones. They can hold a surprising amount of gear thanks to the stretch, though items aren’t fully locked down or protected from the elements. Still, for quick-access items, they work well.

Two compression straps on either side help cinch everything down. They’re especially useful when the pack isn’t fully loaded or when you’re trying to secure gear in those stretchy outer pockets. It’s a simple addition, but one that goes a long way in keeping things tidy.

Fit Notes

The harness system is where the Skala 40L really flexes its muscles.

Starting with the back panel, it’s adjustable via a hook-and-loop system that lets you adjust the height to better fit your torso. Combined with the fact that the pack comes in S/M and L/XL sizes, there’s a good chance you’ll be able to dial in a solid fit. It’s well-padded and aerated, too, which helps keep things comfortable whether you’re hiking, cycling, or just moving around the city.

Behind the scenes, there’s an AlumaLite frame providing structure. It’s lightweight but provides noticeable support, especially when the pack is fully loaded. The result is a carry that feels stable and capable without being overly rigid.

The shoulder straps are equally well executed. They’re padded, breathable, and have a natural curve that conforms nicely to the body. Load lifters are included, which is always a win on a pack of this size—they help shift weight and fine-tune the fit, depending on how you carry your gear.

There’s also a sternum strap mounted on a rail system for micro-adjustments. Bonus points for the built-in whistle on the buckle—useful in an emergency, or, you know, for mildly annoying your hiking partner.

Then there’s the hip belt—and it’s a beefy one. It’s heavily padded, well-ventilated, and includes pockets on both sides for snacks or small accessories. It does a great job of transferring weight off your shoulders, making longer carries significantly more comfortable. If you don’t need it, you can remove it entirely, though the pack feels noticeably less capable without it. It also shifts the aesthetic away from “serious hiking pack” to something a bit more casual.

Inside The Pack

At the top of the pack, there’s a large lid pocket with no internal organization. It spans the entire top flap and works well as a dump pocket for accessories, snacks, or extra layers. There’s also a key leash inside, which is a nice touch—especially on a hike when you don’t want to dig around for your keys at the trailhead.

The main compartment is where things get interesting.

YETI has adopted a tri-zip design. It’s essentially three zippers forming a Y-shape that allows the pack to open wide, almost like flower petals. It’s a signature feature from Mystery Ranch that offers excellent access to your gear. You can open just the top or unzip the whole thing for a full view of the interior.

That said, the PU-coated zippers strike again here. While they add weather resistance, they also make the opening experience slower and a bit more cumbersome. It’s harder just to yank the pack open in one quick motion, which takes away some of the magic of the tri-zip design. We miss you, baby.

Inside, you’re greeted with a massive, open space. There’s very little built-in organization, so you’ll need to bring your own system—packing cubes, a tech pouch, and the like. For some, that’s a pro; for others, it’ll feel like extra work.

There is a liner pocket with an elastic top designed to hold a hydration bladder, along with a pass-through to route a hose out to the shoulder straps. It’s a solid setup for hiking and works exactly as intended.

Beyond that, though, it’s mostly a blank canvas. This pack leans heavily into user-driven organization, which aligns with its hiking roots but may feel sparse for everyday carry.

In many ways, the Skala 40L is like a mullet. Up front, it’s lightweight and minimal. Around back, it’s all business with a highly capable harness system. The result is a pack that feels comfortable and adaptable, even if it doesn’t fully commit to being ultralight.

For context, there are lighter packs out there with more capacity, so if you’re coming from the ultralight world, this won’t feel particularly light. But if you’re used to heavier gear—or, say, YETI coolers—it’ll feel like a step in a more agile direction.

All things considered, it’s a comfortable, capable pack that’s easy to use and versatile enough to handle both trail and city environments.