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Osprey Packs Ultralight Stuff 18L Backpack


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Ultralight Stuff 18L Backpack

Osprey's Ultralight Stuff Pack has the room you need for a day's worth of gear whether you're hiking, multipitch climbing, or traveling across foreign cities. Stow the Ultralight Stuff Pack inside itself and pack it up in bigger climbing packs, then take it out after the approach and when it's time to ascend the hundreds of feet above you. The air mesh back panel uses minimal padding and breathable fabrics to keep your back comfy throughout. There's a top zippered stash pocket for valuables, and a stretch side pocket for water bottles.
  • Air mesh back panel
  • Stretch mesh side pocket
  • Top zippered stash pocket
  • Ultra compact storage
  • Item #OSP004F

40D nylon ripstop
18L (1098cu in)
air mesh
top panel
1 stretch side, 1 zippered top
4 x 4 x 2in
Claimed Weight
Recommended Use
travel, climbing, hiking & camping
Manufacturer Warranty

Tech Specs

What do you think about this product?


>Rating: 4

Great for bicycle commuting, nice design

I've used it several times

I got this pack for commuting by bike and it's almost perfect, especially for the price. Feather light, comfortable, and great zipper construction. It could use a chest strap. The 'almost' is because the "Air mesh back panel" got my hopes up for better ventilation, which was something I was looking for.

>Rating: 1

Don't bother

I've put it through the wringer

The pros: Lightweight - packs extremely small The cons: No support No chest strap (can't run easily with it) NOT durable Water bottle pouch useless - will drop your standard Nalgene bottle I've taken this bag on a few backpacks to the Adirondacks, as well as an occasional bike ride here or there. I tried taking it on a winter run to hold a layer and some water but ended up just holding it in my hand for the duration. Regarding the durability of this bag. I've had this bag for a little over a year taking it on occasional trips. I found I can't store my keys in the bag without it poking holes in the bottom. Finally after my most recent bike ride with the bag, the whole bag ripped open at the seam. Conclusion: I'll trade it for a drawstring bag


Hey Billy, thank you for the review and also the feedback. I have used mine a bunch and understand that I do make tradeoffs when I go so lightweight, so that may address your lack of support, no chest strap, etc. It's feature is it's weight and packability. Now, I still don't think that your keys should poke a hole in it, and seems should be sturdy (again, to a point... it's not designed to carry 25 pounds). This bag is not made for active use (running), so I am not suprised that it didn't work for you. May I recommend the Osprey Daylite to you? That will be a better option for your active life. This Stuff Pack is designed for travels who need to pack away a little extra something for a bag to carry things around. Sorry this pack didn't meet your expectations, though! Seems like it just wasn't the right pack for your needs. Leta Osprey Rep

Hey Leta, You bring up the good point that this bag is not meant for active use. I find it hard to use it with almost all of my active sports, including hiking. I understand the trade-offs of lightweight packing. The lack of padding is definitely a trade off with the reduced weight and size. You could however find a chest strap and a working water bottle pouch on a number of other ultralight packs. Check my original post for an updated picture of the key holes. Sincerely, Billy

>Rating: 5

great light backpack!

I've used it several times

bough this for a 10 day hiking trip in Canada and it was perfect for carrying items for a several hour or half day hike. i put sunglasses case, water, hand wipes, gloves, tissues, camera, and layers. Filled to capacity it did start to give some mild neck discomfort from the straps, but this was only because I think it was overfilled. for a less-full pack, it is very comfortable.

>Rating: 5

Instant storage!

I've put it through the wringer

Super stoked on this pack! I use it for the light commute to work, and for the extra packable storage when bikepacking. My favorite use of it so far, is when I need to run errands after wanting to get a ride in...It packs up nicely into my jersey pocket for the ride, then poof!, instant grocery bag!!

>Rating: 5

Durable and Lightweight!

I've used it once or twice and have initial impressions

Packs down to about the size of your palm, super light, and comfortable to boot. The best summit bag I've used or seen. Just get one already.

Well said, Robin! Thanks for the great review! Leta Osprey Rep


What are the dimensions?

Dimensions H x W x D: 17H X 9W X 7D IN.