Osprey Ultralight Stuff Pack Review

One of the smallest and lightest packable backpacks available, the Osprey Ultralight Stuff Pack is great for travel—though it lacks internal organization.

Our Verdict

7.7 /10
Good info






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  • One of the smallest packable backpacks on the market
  • Weighs almost nothing (less than an apple!)
  • Made of high-quality, durable materials


  • No sternum strap
  • Zero internal organization
  • Flimsy water bottle pocket

Technical Details

91 %

Carry-on Compliance

View 132/145 Airlines

56 %

Like the Look

Polled on Instagram

  • Capacity


  • Weight (oz)

    4 oz (113.4 g)

  • Denier


  • Dimensions

    17 in x 9 in x 7 in (43.2 x 22.9 x 17.8 cm)

  • Notable Materials

    YKK Zippers, Ripstop Nylon

  • Manufacturing Country


  • Warranty Information

    All Mighty Guarantee

Buying Options

Osprey Logo
Backcountry Logo
Public Lands Logo
Amazon Logo

Full Review

When you stop and think about it, the fact that packable backpacks exist is mind-blowing. Not even the science fiction authors of the 1960s could’ve predicted that we’d soon live in a world where backpacks can cram down to the size of a soda can and weigh less than a piece of fruit.

Osprey Ultralight Stuff Pack Stuffed With Phone
Osprey Ultralight Stuff Pack Stuffed With Phone

And the Osprey Ultralight Stuff Pack is one of the smallest packable backpacks we’ve tested to date. Of course, that’s its selling point. But that size means you’ll have to compromise on some other features, especially organization and comfort. Is it worth it? Read on to find out.

Materials & Aesthetic

When you first unpack the Osprey Ultralight Stuff Pack from its self-stuffing pocket, you’ll be greeted with a wrinkly mess. Don’t worry, though, most of those wrinkles will drop out as you use it.

Osprey Ultralight Stuff Pack Outside
Osprey Ultralight Stuff Pack Outside

If you look beyond the wrinkles (squinting helps), you’ll see a minimalistic design that’s common with most packable packs. The Osprey logo is stamped front and center with a reflective material that’s nice for all those late-night adventures. Because Osprey is highly-regarded in the backpacker/outdoor community, the logo alone gives it an outdoorsy vibe, but there’s nothing else particularly outdoorsy about it. We think it’ll fit right in in most cities (especially in the darker colorways).

Osprey Ultralight Stuff Pack Logo
Osprey Ultralight Stuff Pack Logo

So let’s talk about the color. We’ve been testing the Ultralight Stuff Pack in the colorway “Shadow Grey.” But it’s not gray—it’s a forest green with a few hints of gray here and there (again, squinting helps). We’ve had similar problems with Osprey products in the past—their website/naming system for colors doesn’t always line up with the actual colors.

Since we began testing the Ultralight Stuff Pack, Osprey has updated its website so the Shadow Gray colorway looks a little more green in the product photos, but still not as green as it is in reality. We don’t mind the green colorway—we actually like it—but it’s disappointing to receive a product that’s different from expected. So buyer beware.

Anyway, it’s also available in Tropic Teal, Electric Lime, and Poppy Orange (but your mileage may vary on what those actual colorways look like in person).

Osprey Ultralight Stuff Pack Material
Osprey Ultralight Stuff Pack Material

On a more positive note, let’s take a look at the materials. Staying true to its name, this backpack is lightweight, clocking in at 0.2 pounds. To put that in perspective—this backpack weighs less than your average apple!

It’s made of the same 40D Ripstop Nylon as the Osprey Ultralight Packing Cubes, which is strong and resistant to tears while staying lightweight. It’s a solid choice, and we expect it’ll hold up—unless you have a penchant for carrying pointy sticks around.

Osprey Ultralight Stuff Pack Zippers
Osprey Ultralight Stuff Pack Zippers

You’ll find NIFCO hardware and YKK zippers throughout this backpack. Both are reputable companies that make reliable products, so we have no concerns about longevity here. That said, Osprey has changed zippers on their products before—going from YKK to unbranded. So make sure to check in with Osprey whenever you’re reading this review to verify the zipper brand.

External Components

There’s not much as far as external components go. After all, one of the features you sacrifice for packability is a robust harness system.

Osprey Ultralight Stuff Pack Harness System
Osprey Ultralight Stuff Pack Harness System

The straps have a thin layer of mesh, which we think is a nice touch and makes the carry comfortable. They’re adjustable as well. And that’s it as far as the harness system is concerned—there’s not even a sternum strap. We don’t think you need anything fancy on a pack of this size, but if you like a lot of support, you’ll definitely find this harness system lacking.

Osprey Ultralight Stuff Pack Shoulder Straps
Osprey Ultralight Stuff Pack Shoulder Straps

There’s a water bottle pocket on the side and, seeing as we’re fans of water, we’re glad to see this. It’s surprisingly big and will fit most water bottles out there, but it’s also floppy. There’s not much structure, and we wouldn’t be surprised if a water bottle slipped right out on any excursions that involve bouncing or bending. If you’re not a fan of water (we’re looking at you, robots), you can also use this as a second quick-grab pocket to store items like snacks.

Inside the Pack

You probably won’t be surprised to learn that the internal organization on this thing is as minimalist as its external components. There are two pockets—a quick-grab one on the top and the main compartment.

Osprey Ultralight Stuff Pack Top Pocket
Osprey Ultralight Stuff Pack Top Pocket

The zippered quick-grab pocket sits on top of the pack and is a nice spot to keep items you’ll want to grab quickly (hence the name). It also has a bright red plastic key clip inside, so you won’t have to worry about losing your keys. We’re usually not fans of plastic key clips—because they break easily—but a metal clip wouldn’t make sense on an ultralight pack.

Osprey Ultralight Stuff Pack Stuff Pocket
Osprey Ultralight Stuff Pack Stuff Pocket

This pocket also contains the storage pocket (which is what you cram the bag into). Because this thing packs to such a small size, it takes some time to stuff. But we don’t mind—we’d rather spend an extra thirty seconds packing it away if it means it’ll be smaller.

The main compartment has nothing special going on. It opens in a horseshoe style, meaning the zippers come down about halfway. It’s basically an empty bucket and has zero internal organization whatsoever. We don’t expect much organization on packable daypacks, so we’re not surprised or disappointed. But if you’re the type of person who wants a place for everything, you’ll be in for a rude awakening.

Osprey Ultralight Stuff Pack Main Packed
Osprey Ultralight Stuff Pack Main Packed

It holds a decent amount of stuff. But we recommend putting anything smaller than, say, a jacket in a packing cube or organizer of some sort. Otherwise, everything will get jumbled—not to mention your stuff may poke into the side of the bag and test the strength of that ripstop we mentioned earlier.

You also want to be careful with what you pack. Packable backpacks don’t like pointy objects, and you probably won’t want to carry anything too fragile either. For example, we only recommend packing a laptop in this bag if you have a hardy case or sleeve for it. Even so, you won’t be able to fit a 15’’ computer. We’ve only been able to squeeze a 13’’ inside.

Durability & Testing

We’ve been testing the Osprey Ultralight Stuff Pack for two weeks in Portugal and around the U.K. It’s a solid packable backpack that’s great for one bag travel, where every ounce counts. Plus, it sells at a very reasonable price point. All that said, using it in the real world isn’t amazing. The carry is okay, although it feels flimsy on the back. Whether or not you think packability is more important than structure and features depends on your use-case.

Osprey Ultralight Stuff Pack
Osprey Ultralight Stuff Pack

Luckily, you don’t have to sacrifice durability. Of course, this backpack won’t be as durable as an over-specced bag made for trekking through the most extreme places on Earth. But for a bag as light as it is—it’s pretty dang tough. We haven’t noticed any issues so far.

Usage Timeline

Initial Usage

Condition: Excellent

  • Lightweight and packable making it ideal for travel.
  • Packs away into its own pocket.
  • Handy stash pocket at the top of the pack.
2 Weeks of Use

Condition: Excellent

Everything still looks good!

By Pack Hacker Team
Created August 29, 2019 • Updated June 25, 2024
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