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Osprey Sirrus 36

rated 4.0 of 5 stars
photo: Osprey Sirrus 36 overnight pack (35-49l)

Wonderful pack! Great layout, perfect fit, and an awsome warranty.


  • Women's specific fit
  • Layout
  • Durability


  • Didn't come with hydration bladder

I recently purchased this pack as a day pack/ overnight pact. I am in love! Need I say more? 

First of all the women's specific fit is dead on. I knew going into the purchase what features I was looking for and was not willing to drop the cash unless it meet or exceeded my expectations.  This pack goes far beyond. 

The pack sits perfectly on my back, size small fits me at 5'2" and 135 lbs, and the straps are positionsed so that they are not in the way and I dont have to keep adjusting them.

Next, the features that stand out most to me are the entry ways into the pack. With a large drawstring entry items can be packed and cinched down, but there is also a zip out portion that allows for access to such items whithout unpacking everything and undoing the drawstring, example I need my fleece it has gotten colder, I can unzip get fleece and be on my way with out unloading everything and repacking, big plus in my book. 

It also has a rain cover built in, as well as nice pockects on the hip belt and straps, being a diabetic and needing to haul supplies and get to them quickly, this is really nice. I don't have to take my pack off to get to check my sugar and get a snack. It is right there so I never miss a beat. They are also very comfortable, another big plus! 

The only downside is that the hydration bladder is a seperate purchase. Not too big of a deal, just would have liked it to be included. Did not change my mind about the purchase. 

Source: bought it new
Price Paid: $112

All things considered, this pack does it all: easy access pockets, lots of space, flexible frame, water holder.


  • Comfortable around hips and pelvic area
  • Comes with cover for dirty trips
  • Many pockets


  • Placement of bladder hose openings are awkward
  • Shoulder straps are positioned a little high

I went to the store to buy a Kelty product, as I had used that brand previously and liked it. However, after trying all brands on I chose the Osprey instead. The positioning of the shoulder straps were much more comfortable then the Kelty, which rubbed my bony collarbones alot.  

I was borderline SM/MD so I went with the MD size. The straps all adjust enough to allow me to get the fit perfect.  The shape of the back needing some adjusting, though. I just wore it normal for a night and marked where the frame needed minor adjustments to match the natural shape of my back. This was easily accomplished and has been perfect since.  

I have worn it snowshoeing and hiking, under multiple types of garements and seems to work well with everything. My 3L Playtpus wide bladder fits OK in the water pocket, but it is a little on the large side. Not enough to cause a problem. It provided lots of space for supplies on my Kilimanjaro trek.The mini pockets on all straps were also helpful.

Source: bought it new
Price Paid: $150

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Price MSRP: $139.00
Current Retail: $220.00
Historic Range: $64.73-$220.00
Reviewers Paid: $112.00-$150.00
Weight 2 lb 13 oz / 1.29 kg 2 lb 15 oz / 1.34 kg 3 lb 1 oz / 1.38 kg
Capacity 2100 cu in / 34 L 2200 cu in / 36 L 2300 cu in / 38 L
Product Details from Osprey »

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