Osprey Ultralight Collapsible Stuff Pack, Blue OS

I travel frequently for both work and personal trips, and the Osprey Ultralight Collapsible Stuff Pack has quickly become one of those “why didn’t I buy this sooner?” travel essentials. It folds down incredibly small in my luggage, yet once unpacked it’s surprisingly comfortable and capable for day trips, airport carry-ons, excursions, and even grocery runs while traveling. What impressed me most is how lightweight it is without feeling flimsy. The material feels durable enough for real-world use, and the shoulder straps are far more comfortable than I expected from a pack this compact. I’ve carried water bottles, souvenirs, snacks, a light jacket, and electronics with no issues at all. The zippers are smooth, the stitching looks solid, and overall it feels like a thoughtfully designed product from a brand that understands travelers. This has become my go-to secondary bag for flights because it takes up almost no space in my suitcase but becomes incredibly useful once I arrive at my destination. It’s especially perfect for international travel, theme parks, hiking excursions, cruise ports, or simply keeping extra storage handy during long travel days. If I could change one thing, I wish it had one additional exterior pocket for quick-access items like sunglasses or a passport. The current design is streamlined and minimal, which many people will love, but one more small pocket would make it nearly perfect for travel organization. Overall, this is one of the smartest travel purchases I’ve made in a long time. Lightweight, practical, durable, and easy to pack — exactly what you want from an ultralight daypack.

I LOVE this collapsible bag. It’s small, lightweight, and surprisingly durable. I’ve used this as a daypack on a recent trip to New Zealand. I prefer to one bag traveling internationally with a 40L backpack. Once I check into my hotel, I leave my large backpack behind and use the Osprey for the day. It’s perfect for exploring the city or going on hikes. I usually pack some water bottles, a rain jacket, chargers, and some snacks. The straps are comfortable with it packed out too. The only con for this bag is that it sags quite a bit from the weight of my gear, but that’s understandable. To make a bag this light and compact, you’d have to remove some structure. Overall, this bag is a great addition for my travel setup.

Never disappointed with an Osprey product! Collapses super small. Easy to stow or attach to a larger bag and perfect for travel where you have to mind how much luggage to bring. The material is thin, but strong. Obviously there is no support with a bag like this but it is a solid trade off for weight and portability. There’s also limited organization and pockets but does have nice water bottle holders and small top zippered compartment. I brought this bag for a caving/tubing adventure in Puerto Rico. It was submerged and dragged through mud and tossed around on the back of a 4x4. Sure it was dirty after that, but a quick wash and it’s just like new. The most important addition’s to this bag compared to others are the adjustable chest strap and light breathable straps. I can tell you I have tested a bunch of similar bags and nothing comes close to the volume this holds, at the weight and compact size, with durable material and features. It’s a definite must have for any traveler. Also, Osprey offers the best warranty around, so if you ever do have an issue I am sure their customer service will take care of you.

I just returned from a two-week backpacking trip overseas. While I checked my 30L backpack, I needed a carryon bag that I could also cram into my backpack for the hiking portion. I also used this pack to carry essentials for a night on the town, while leaving my larger pack in the hostel/albergue. This Osprey pack was exactly what I needed. Packability: I didn't even bother folding this bag up; I just crammed it into the bottom of my pack, and it flattened down to nothing. I didn't even notice it was there--It took up next to no room, and it weights next to nothing. Durability: this pack is very tough for having such thin, lightweight material. It holds up to abrasion and dirt, and it is even somewhat water resistant. This is not a pack that you can rip on a tree branch, or poke a pen through if you have one in your pack. Comfort: The chest strap (which also has a built-in whistle) and the shoulder straps distribute the weight evenly. Since this is a packable pack, there is no cushioning. So if you were to fill this backpack with sharp rocks, you will feel every one of them. I did wear this pack around a lot, and it was very comfortable to do so for several hours at a time. Capacity: I did worry that the airline would lose my checked hiking pack with all of my gear, so I filled this pack with a lot of stuff for the airplane, just in case. It fit a full change of clothes, a raincoat, microfiber towel, all my toiletries, an international AC adapter, two external batteries, cords, an iPhone and iPad mini, and half a dozen charging cords. Not to mention some snacks. And there is a water bottle holder on each side of the pack. I was able to fit a 1-liter Nalgene bottle in each of these. This is going to be my go-to backpack for this kind of travel for a long time.

Durable, with great simple features. This is the 5th lightweight bag I've purchased in the past few years and I chose this one because: 1. It packs down super small. Wrapped into the top pocket, it becomes the size of a fat wallet. 2. It has water bottle holders on the outside, both sides. So many of the other lightweight waterproof bags don’t. 3. The top pocket is large enough to hold all my misc items, and has two compartment inside too. 4. Osprey quality and long warranty. Have been using it for a couple weeks and love it. Straps are comfortable, bag size is perfect, and the large zipper pulls are something I never new I was missing before but really like having now. Extra tip: if you have a tall water bottle, a small carabiner on the bag's top handle, clipped to the water bottle lid loop (if it has one), really helps stabilize and secure the bottle.

Very compact and lightweight. I travel with it in my luggage or larger backpack. However, it is small, has minimal pads on shoulder straps and no waist strap, so this is not a serious day-hike bag. Good for throwing in a few things for a couple hour hike. I like this for its packability, but dont pull it out as often as I thought due to the shortcomings listed above.

This is my second ultralight osprey backpack, after using the first one a thousand times, probably loading it with too much weight at times. I always pack it in my suitcase for day trips. My laptop fits in it too when i want to use it as my personable item on the plane. There is a tiny pocket inside the smallest pocket, which is very handy for cash when you want to travel light. Perfect size, sturdy material.

Recently came back from traveling with minimal luggage. I wanted a day backpack that could be stuffed into my backpack on a trek, while being used on days I didn't need to carry my bigger backpack. This one works great! It is lightweight and packs very small, so doesn't take space or add weight. Overall it fits everything needed for a day hike or out and about in a city. The side pockets fit a water bottle and the upper zipped pocket fits small stuff like keys & wallet. There isn't much back support, as expected from a minimal day bag, but the chest strap helps keep the bag secured on my shoulders. I didn't check the water resistance, since there was no rain on my trip. It's a good design and I recommend this bag for minimal packers.

Klein en moeilijk om verder weer in te pakken weer retour gestuurd

両サイドにペットボトルを入れられるのが良い。この手の製品は苦労するものも多いが畳んでポケッタブルにするのも簡単だった。良い商品です。

Smidig att ha med och skön att bära.

Super als zusätzlicher Rucksack für Flugreisen oder alle Zwecke, wo man einen Extra-Rucksack im Gepäck verstauen muss. Klein, leicht, schöne Farbe, stabil. Ist natürlich nichts für eine Wanderung mit fünf Kilo Gepäck. Dafür liegt er am Rücken zu eng an (Schwitzen!) und er ist null gepolstert (Trägergurte und Rücken). Aber z.B. um nach dem Check-in am Flughafen Handy, Tablet und Verpflegung für die Reise unterzubringen ist er sehr gut geeignet. Wir haben ihn auch für kleine Stadttouren im Urlaub genutzt. Wenn man ihn gut packt, drückt nichts am Rücken und es passt auch einiges rein.

I was initially skeptical about whether this bag would be able to accommodate all my daily essentials during my trip. However, I was pleasantly surprised by its capacity and practicality. The size proved to be just right—it held my water bottle, a light jacket, and a few personal items with ease. One of the standout features is its water-resistant material, which provided added peace of mind during our visit to the waterfalls. Additionally, the bag is impressively lightweight yet sturdy, making it comfortable to carry throughout the day without compromising durability. Overall, this was a great purchase that served me exceptionally well throughout my entire trip. I highly recommend it for anyone seeking a reliable and compact travel companion.