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Osprey All Mighty Guarantee


The Duro 15 is built for big days where your pack is the only aid station you'll find. For runners more interested in routes than races. With plenty of room for all-day or even multi-day kits, whether you sip bottles or use a reservoir, the Duro 15 will keep you company and see you through the longest of days. Convenient features like trekking pole storage, included hydration, soft flask compatibility (or use both for long, water-scarce routes) and bounce-free carry it is the pack for aspiring ultrarunners and adventurers everywhere.

Key Attributes


Vest-pack fit provides bounce-free stability and purpose-built for incredible comfort so you can focus on FKT's and PR's.


Bottles, reservoirs and add-on flexibility for short runs, long runs and everything in between. You decide what you need. Duro/Dyna makes it possible.


Pockets up front for quick access to fuel and soft-flasks, trekking pole storage when you need to use your hands as much as your feet to move forward, and room for rain gear and extra layers.


  • Vertical zippered harness slash pocket with whistle zipper pull
  • Dual accessible lower side panel stretch mesh pockets
  • Dual extra-large stretch mesh flask/phone/food harness pockets
  • Dual lower stretch mesh food/supplement harness pockets
  • Dual-zippered accessible lower side panel stretch mesh pockets
  • Lower compression straps
  • Front panel zippered slash pocket

Carry Information


  • Mesh covered, die-cut slotted foam harness
  • Slotted adjustable sternum strap with safety whistle
  • Stretch woven harness pocket (s)


  • Breathable mesh wrap with soft, irritation-free contact surface


  • Adjustable and removable dual chest straps for additional stability
  • Front harness gear- and food-organization pockets
  • Breathable mesh wrap with soft, irritation-free contact surface
  • Die-cut eva foam for larger loads (15L only)


  Volume Dimensions Weight
M/L 915 in3 / 15 l 18.9h x 8.66w x 8.27d in. 1.687 lbs.
S/M 793 in3 / 13 l 16.93h x 8.66w x 8.27d in. 1.543 lbs.
M/L 915 in3 / 15 l 48h x 22w x 21d cm 0.765 kg
S/M 793 in3 / 13 l 43h x 22w x 21d cm 0.7 kg
70D x 140D Nylon Triangle Ripstop
320Gr Nylon Stretch Mesh
200Gr Nylon Stretch Mesh
Product Manual Additional languages available here »
WARNING: This product can expose you to chemicals including dimethylformamide, which is known to the State of California to cause cancer. For more information, go to oehha.ca.gov/proposition-65/about-proposition-65

Special Features


Front panel stretch mesh compression pocket


Hipbelt wrap with zippered hipbelt pockets


Zippered reservoir sleeve with included Hydraulics® LT 2.5L Reservoir


Dual-zippered panel access to main compartment

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Under-rated pack


I purchased this product not only for running but for use with biting as well. Found myself using it for day hikes because it keeps things organized and stays in place. I found the chest straps to be slightly frustrating at first but have zero complaints since I have used it a few times. I do wish that for the price the water bottles came with it… So far it has survived several adventures and still looks great. I love the fact that it does not move around even with a full load. And yes I have recommended this to a couple of friends who are loving theirs as well.

Southwest Missouri


Good Pack for Day Hiking


Unlike the other reviewers, I haven't had trouble with the sternum straps unless I was very cold, and my hands weren't working well - and that would make any strap challenging. I really like this pack for trail running and longer day hikes. Lots of capacity, very good accessibility while on the move.

Seattle, WA


Great way to go fast and light


I've been searching a long time for a medium volume vest style pack that will allow me to run with clothing and/or gear without it bouncing all over the place. This is the best I've found at this size. I have the Duro 6 as well and use it nearly every day for short to medium runs in the warmer months when I don't need to carry much. The Duro 15 really shines when my needs exceed running trails for a couple of hours. The 15 holds a liter more water than the 6, adds hipbelt pockets, and can manage a minimalist overnight or two if the nature of your gear will allow it (read: compact, lightweight, high quality). The pack moves with you when you run, it's organized sensibly, and I can fit my phone in the front zipper pocket with room to spare (iPhone 6s). I'm pretty hard on my gear and it's held up well to frequent use. Possible cons or tradeoffs if you're considering the pack: no pack cover, dual chest straps are a little high maintenance (though you do get used to them after a while), main shove/stretch pocket straps must be undone in order to access the three zippered compartments in the main portion of the pack. It can be hard to slip a full reservoir into the pack when it's full of gear (the bladder is not rigid), so make sure to fill it first, then pack up. Note as well that as you run and drink and empty the reservoir you must continually cinch the chest straps, because the volume of the pack overall shrinks and it will start to bounce and slosh if you don't stay on top of it. But this becomes intuitive after a while and is hardly worth mentioning. Lastly, it is possible to carry a small laptop if you have a svelte case of some sort to slip into the main compartment - there's no integrated sleeve or anything specifically designed to hold something with a screen, but I do it all the time. Basically, between the Duro 15 and the Duro 6 I have about 95 percent of my needs covered if I want to run trails and carry a bunch of stuff.

Merrimack, NH


Lots of functional detail problems !


This pack and it's similarly styled ones from Osprey, mean well, but in my opinion do not deliver. The two snap closures on front are outright difficult to close, unless you do it in slow motion under full vision, which is difficult to do when moving or you don't have the neck mobility of a circus contortionist. The two snap closures on the pack of pack that secures the mesh compartment to the top of pack, prevents you from accessing the main compartment, unless you unlock the two snap closures.This in my opinion is a hassle and unnecessary step for oneself and anyone else accessing the main compartment from behind while you are on the move. Also felt to me as the pack did not fit snugly over my shoulders and there was no way to independently snug the top half of pack to shoulders. Used the pack a few times for hiking and mountain biking and then gave up. Total waste of money for me.

Carbondale, CO


Awesome fit and organization. Sternum clip design is bad


Perfect for run commute with a lunch and change of clothes. But could not stand the sternum clips system. It uses a rail system which made it hard to close the strap quickly ans easily. If only this bag would use traditional clips it would win this hybrid running vest / hiking bag segment which the market is not addressing well.




3.4 5


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