This is a great pack to use for day or half day excursions away from base camp. It weighs next to nothing and has plenty of room for water, food, camera, and an extra layer. Maybe a little too much room as there is no way to cinch it down for smaller volumes, but that's the price you pay for the weight savings. I do wish that the straps were longer. I'm 6'2" and have trouble getting my arms inside the straps to put the pack on. I also wish there was a strap or loop on the inside for hanging a water bladder. And if you carry a bottle in the outside pocket and bend over, don't be surprised if the bottle ends up on the ground, in the mud, or floating down stream. You've been warned.

NM_Nomad

Desert Southwest

Found a way to carry, in this pack, everything but food and water, keeping the weight under 5 lbs. How? Purchase 3 toiletry organizers (10 x 4 x 5.5 each) from another company that also makes bags and attached them to my leather belt in my nylon short/pants using the wide loop end for the belt to go through on one end and slide my belt inside the carabiner which is attached to the small loop on the other end. The 2 side ones each carry a 1 liter water bladder and the back one the food. Since these bags weigh in at 1.6 ounces each and the pack weighs in at 3.2 ounces, you are talking 8 ounces and around very low $100s to carry gear for a 4 day / 3 night AT Summer Hike. The bag itself is missing a couple of items, a second pocket, for those overnight trips where you just want to carry 2 water bottles and a chest strap, which I added (weighs 0.7 oz/ 20 grams) to allow adjustments for each body type or allow to change width for . Each of the 2 biners weighs in at .1 oz or 2.8 grams. The bag material is very strong for its light weight. The inside pocket at the top is handy for small items that can get lost. If Osprey adds a second pocket and a chest strap, they would have the talk of the town at around 4 ounces. Otherwise, it does the job pretty well for this application.

Fred Bar

Miami, FL

This is an addendum to my prior review. I sewed a small loop to the back of the main compartment, so I could hang my Camelbak 3-liter hydration bag to it. I tried it and it worked well. Osprey may want to consider adding this feature. the pocket for a water bottle that the pack comes with is pretty loose. It's okay as long as you don't bend over. If you do the water bottle falls out readily. Otherwise, as I said before, I like this pack.

Ellen G.

San Diego, CA

I like this pack. I got it recently for day hiking while backpack camping and used it for a number of hours one day. It does the job. It holds a lot and is comfortable. I took it rock scrambling up a desert canyon that was overgrown after a heavy rain season (Southern Cal.) I was sliding down boulders so the bottom of the pack may have dragged. Also, was getting caught on a lot of Cat Claw Acacia and other nasty desert foliage. The pack ended up with two small holes on the bottom of it. I think this was unusually brutal use and would not happen with normal use. So this is what tenacious tape is for, right?

Ellen G.

San Diego, CA

We bought this pack while on vacation for a month and used it every day. It was perfect for day trips that carried stuff for two people. I would highly recommend it as a light little pack that is convenient to pack in your suitcase and use for day trips.

Frank on Vacation

CT, USA

This is a great pack. I use it for when I go on adventures in the woods, fishing or traveling. This pack is super light weight. A really good use for this pack is to throw it into your backpacking backpack and use it to go on short hikes from your campsite and being able to carry everything you need in a light weight pack without having to use your regular pack.

Jarkvarr

Homosassa Florida

Full disclosure, I'm an Osprey guy. All my packs are Osprey. I just love the way they fit me and their top notch quality. Not to mention their almighty gaurantee! But I am so happy that Osprey finally addressed the need for an ultralight stuff pack. I am an adventurer who travels internationally a lot. I like to travel light and prefer carry on only when I can. Usually my EXOS 38, Talon 44 or Stratos 50 can be used as carry on no problem. But sometimes if my pack has to be checked, I need a smaller pack to put my valuables in for the plane. Also once I land, sometimes I want to leave my larger pack in the hotel or hostel and walk around town with a smaller pack. The Osprey Ultralight stuff pack is perfect for both these needs. It packs up to practically nothing and I can just throw it in with the rest of my gear without noticing. It really is amazing. It's also fully featured with an actual side water little pocket, top stash pocket for keys and smaller items as well as a fairly roomy main compartment. I can fit my camera, iPad, rain jacket and snacks comfortably. Love this thing. I used to carry my Talon 11 on trips for such uses, but no longer. The osprey Ultralight stuff pack goes with me on every trip now.

Regan

NY

Great platform where Osprey could add another side pocket and a sternum strap, keeping the weight under 5 ounces and the price increase by $10 and voila, you'll have a SUL pack ready to devour the competition.

Fred Bar

Miami, FL

I haven't used the backpack yet but it looks great. Exactly what I was looking for. My problem was trying to find one. I first heard about this travel backpack in an article in the Toronto Star travel section recently. It provided the Osprey website which provided a list of stockists in the Toronto area. However, the first stockist I went to, Enduro Sport on Laird Drive had never even heard of Osprey. I tried two branches of SportChek on the stockist list and neither carried it. The second store was able to check online and tell me of two Atmosphere stores that had these backpacks so I went to the Shops at Don Mills and was thrilled to find a sale with a second pack at 50% so I bought two. I do think Osprey needs to update their stockists lists as this was quite frustrating.

TravelGal

Toronto, Canada

Very well designed lightweight bag that folds down to the size of my fist! Materials are high quality as you expect from Osprey. I like the small top pocket and side bottle pocket. I think it would really benefit from a sternum strap. I know it is meant to be as minimalist and lightweight as possible (and it is), but the straps tend to fall of my shoulders when I get active (I use a strip of "velcro" as a sternum strap). However, the straps are very confortable, even when the bad is full. Getting 18 liters from a bag so light, packable and confortable make it the perfect daypack for me!

Nicholas

Montréal, Québec, Canada