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Osprey Sirrus 24 Review

This pack is loaded with features, though lacks a few usability details and runs a touch small
Osprey Sirrus 24
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Price:  $160 List | $159.95 at Amazon
Compare prices at 2 resellers
Pros:  Comfortable, well-ventilated, adjustable torso length, included rain cover
Cons:  Heavy, difficult to access hydration pocket, rigid structure is an odd fit
Manufacturer:   Osprey
By Maggie Brandenburg ⋅ Senior Review Editor  ⋅  Jun 21, 2021
Our Editors independently research, test, and rate the best products. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Learn more
74
OVERALL
SCORE


RANKED
#5 of 13
  • Comfort - 25% 9.0
  • Versatility - 25% 6.0
  • Weight - 15% 5.0
  • Ease of Use - 25% 8.0
  • Durability - 10% 9.0

Our Verdict

The Osprey Sirrus 24 is a great daypack that continues to be one of our favorites over the years. It's comfortable, has lots of padding and an open mesh back, and lots of great extras. While it only comes in one size, the back does adjust up to four inches, one of just a few packs in this review to do so. Ultimately, it comes down to a choice between a back panel made of comfortable, squishy padding, or the less padded but greater airflow design of the Sirrus. If you get hot easily while hiking, this design may be more comfortable for you, and we love the bag itself.

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Price $159.95 at Amazon
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Overall Score Sort Icon
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Pros Comfortable, well-ventilated, adjustable torso length, included rain coverLarge capacity for versatile uses, great back ventilation, adjustable torso, included rain coverGreat features and pockets, easy to use, adjustable torso lengthGreat ventilation, backpack-like comfort, useful pockets and attachments, well built, intuitive useGreat access to your gear, big pockets, simple yet versatile
Cons Heavy, difficult to access hydration pocket, rigid structure is an odd fitRuns small, heavy, easy to overstuff for average day hike needsWater bottle pockets are a bit small, front stow pocket is a bit smallOne size only, heavyUnsupportive hip belt, not the most breathable back panel
Bottom Line This pack is loaded with features, though lacks a few usability details and runs a touch smallLook no further for one of the most comfortable daypacks in our test group for heavy loads and big days outThis pack can comfortably do-it-all with excellent features, strong durability, and impressive adjustabilityAll the comfort and security of a full backpack in a bite-sized daypackA durable, versatile pack that's both easy to use and easy on your wallet
Rating Categories Osprey Sirrus 24 Gregory Jade 28L Osprey Tempest 20 Gregory Juno 24L REI Co-op Trail 25...
Comfort (25%)
9.0
10.0
9.0
9.0
7.0
Versatility (25%)
6.0
8.0
8.0
7.0
8.0
Weight (15%)
5.0
5.0
6.0
6.0
6.0
Ease of Use (25%)
8.0
9.0
9.0
8.0
8.0
Durability (10%)
9.0
8.0
8.0
9.0
9.0
Specs Osprey Sirrus 24 Gregory Jade 28L Osprey Tempest 20 Gregory Juno 24L REI Co-op Trail 25...
Measured Weight 43 oz. 42 oz. 31 oz. 31 oz. 30 oz.
Volume/Capacity 24L 28L 20L 24L 25L
Back Construction Ventilated tensioned mesh Crossflow suspension AirScape backpanel; large spaced horizontal padding bars covered by large-holed mesh VaporSpan ventilated mesh HDPE framesheet
Hydration Internal hydration sleeve Internal hydration sleeve External hydration sleeve Internal hydration sleeve Inner hydration sleeve
Hipbelt Yes Yes Yes Yes Yes, removable
Compartments 1 1 1 1 1
Rain Cover Yes Yes No No, but DWR finish Yes
Additional pockets 7 6 8 6 5
Outside Carry Options Trekking pole attachment, trekking pole quick-stow, ice axe loop, 2 side strech pockets, 3 zippered pockets, 2 zippered hip pockets External stretch pocket, trekking pole holders, ice axe attachement, sunglasses loop and bungee, hip belt pockets, hydration hose clip Lidlock helmet attachment, trekking pole quick-stow, large stretch front pocket, ice tool loop with bungee tie-off, side pockets, hip belt pockets, sunglasses shoulder stow, bike light loop Lare exterior stretch pocket, 2 stretch side pockets, 2 zippered hip belt pockets, 1 zippered pocket, hiking pole storage, ice axe loop Pole fasteners, side mesh pockets with elastic enclosure
Whistle Yes Yes Yes Yes Yes
Key Clip Yes Yes Yes Yes No
Materials 210D nylon body, 420D nylon bottom 210D nylon body, 420D nylon bottom 70D x 100D nylon body, accent and bottom 420HD nylon packcloth 210D Honeycomb Cryptorip nylon, 420D reinforced bottom Recycled nylon
Notable Features Integrated rain cover, ice axe loop, trekking pole quick-stow, adjustable back Adjustable torso length, internal pocket, cinch straps, sunglasses quick-stow Helmet attachment, trekking pole quick-stow, sunglasses quick-stow, bike light loop, shoulder strap pocket, stowable ice axe loops Sunglasses stow loops, hydration hose attachment, trekking pole attachment Ability to add REI Trail 2 Waistpack for more storage, contoured foam harness, raincover included, bottom is reinforced to be abraison resistant

Our Analysis and Test Results

The Osprey Sirrus 24 is made with 210-Denier nylon with 420-Denier nylon on the bottom. It comes loaded with many great features, including a rain cover and open mesh back design.

Performance Comparison


Some recent updates to the Sirrus make it a feature-filled bag with...
Some recent updates to the Sirrus make it a feature-filled bag with a rigid backpanel.
Credit: Maggie Brandenburg

Comfort


This pack received a high score for comfort. There's ample padding in the flexible shoulder straps, which are thick and comfortable if a bit inelegant. The hip belt has more tapered edges but the padding is a bit thinner than the shoulder straps. Unlike previous versions, this latest iteration has taller wings and wider webbing that cover a comfortable amount of our hip bones. The suspended mesh back design is comfortable against your back, though the sides of the pack wrap around farther than we'd like, limiting airflow behind the panel. Though the torso length is adjustable, this panel is more rigid than most models. Rather than flexing with you as you move, it has a tendency to pop off your hips and ride upward as you walk, unless only moderately tightened.

The hip belt of the Sirrus is comfortable, but the rigid structure...
The hip belt of the Sirrus is comfortable, but the rigid structure of the back panel doesn't move with you very well when it's tightened all the way down.
Credit: Maggie Brandenburg

Versatility


The Sirrus is loaded with useful features that are handy for just about any adventure. There's a rain cover that stores in a pouch at the bottom of the pack, side compression straps and top buckle compression straps (for attaching a rope around the top of the bag), an ice axe holder loop with a bungee cord, and several different smaller organizational pockets. It also has Osprey's "stow on the go" trekking pole attachment, which lets you stow them quickly under your arm and up into a shoulder strap. This is great for quick storage when you want to scramble up a boulder or other hands-free needs, but not so great for any longer than that. Overall though, the features are great and well-thought-out.

The Sirrus is full of features in specific configurations that are...
The Sirrus is full of features in specific configurations that are useful, if not always flexible in their usage.
Credit: Maggie Brandenburg

Weight


At 43 ounces, this is one of the heaviest packs in our review, though it does include an integrated rain cover. Additionally, the open mesh back requires an internal frame (which more and more daypacks are ditching), and that and the more durable material adds to the overall weight of the pack. If you don't need or want the extra airflow, carry minimal stuff in your pack, and want all of your gear to be as light as possible, there are other, lighter options out there that forego the internal framing and helpfully distributed pack weight. But for what you get, we think the ounces are justified.

Click to enlarge
Click to enlarge

Ease of Use


We think that overall this pack is fairly easy to use, with long zippers, lots of useful pockets, and decent organization for on the go. If you're the type of person who always carries a large hydration bladder, you might not enjoy the difficult-to-access pocket for your gear. The very rigid corners of this pack prevent you from opening the elastic-topped pocket as wide as you'd want, if you're trying to fit a full 3L water bladder. The hose hole is also very small and tight — we couldn't fit the mouthpiece of our Platypus hydration hose through it and had to detach it and thread it through the opposite way to make it fit. The Sirrus 24 comes in only one size, but it has an adjustable torso length that takes the back from 15 to 19 inches. In that sense, it is one of the more adjustable packs in our review group. However, it does seem to run small, with our main tester (17 to 17.5-inch torso length) finding herself on the upper limit of this pack.

The extremely rigid back panel makes it difficult to fully open this...
The extremely rigid back panel makes it difficult to fully open this pack for easy access to the hydration sleeve. The larger the bladder, the more difficult it is to slide into this difficult to access spot.
Credit: Maggie Brandenburg

Durability


As we've come to expect from Osprey packs, the Sirrus impresses us with its durability, and we gave it top marks in this metric. It's made with a heavier 210-Denier nylon in the body (many other packs in this review use only 100-Denier nylon, which won't hold up as well to spiky plants and sharp rocks) and there is a 420-Denier panel on the bottom for extra durability in that high-wear spot. Osprey also stands by their products and will repair or replace defects or structural damage (but not cosmetic wear and tear).

This pack is well built of durable materials with key areas...
This pack is well built of durable materials with key areas reinforced.
Credit: Maggie Brandenburg

Value


This is one of the pricier packs in this review. It has a few quirks that might not be right for everyone but comes fully loaded with helpful features that just might be exactly what you're looking for.

Conclusion


There's a lot to like about the Osprey Sirrus 24. It's a comfortable daypack with an above-average amount of back ventilation. We are not a big fan of the hip belt, which kept riding up onto our waist, and think the structured back panel detracts from the bag's overall usability, but we love the features and pockets of this handy bag.

Ready to explore with the fully-featured Sirrus.
Ready to explore with the fully-featured Sirrus.
Credit: Maggie Brandenburg

Maggie Brandenburg
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