The Osprey Sirrus 24 is a great daypack that comes close to winning our Editors' Choice award. 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 4 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.
Osprey Sirrus 24 Review
This pack is loaded with features, and if it fits, you'll love it!
Price: $140 List | $129.95 at Backcountry
Compare prices at 3 resellers Pros: Comfortable, well-ventilated, adjustable torso length, included rain cover
Cons: Heavy, ill-fitting hipbelt
Manufacturer: Osprey
Compare prices at 3 resellers Pros: Comfortable, well-ventilated, adjustable torso length, included rain cover
Cons: Heavy, ill-fitting hipbelt
Manufacturer: Osprey
By Cam McKenzie Ring ⋅ Senior Review Editor ⋅ Aug 28, 2017
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
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Our Verdict
Compare to Similar Products
 This Product
Osprey Sirrus 24 | |||||
| Awards |  |  | |||
| Price | $129.95 at Backcountry Compare at 3 sellers | $149.95 at Amazon | $109.95 at Backcountry Compare at 3 sellers | $149.95 at REI Compare at 3 sellers | $124.98 at Amazon Compare at 2 sellers |
Overall Score  |
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| Star Rating | |||||
| Pros | Comfortable, well-ventilated, adjustable torso length, included rain cover | Comfortable, lots of good features, water reservoir included | Adjustable torso length, very durable, great features and pockets | Large capacity, good back ventilation, adjustable torso, included rain cover | Moves with you, durable build, well-balanced load carry, good pockets and carry options |
| Cons | Heavy, ill-fitting hipbelt | On the heavy side, expensive | Runs a bit small, front stow pocket a bit small | Runs small, heavy, expensive, large for average day hike needs | No hydration reservoir clip (loop only), not meant for downpours, very long torso |
| Bottom Line | This pack is loaded with features, and if it fits, you'll love it! | A versatile daypack that can hold a lot of gear. | A versatile, durable, and comfortable pack for the trail or town. | The biggest and most comfortable daypack in our test group. Great for heavy loads and big days out. | A comfortable pack for even heavy loads over long distances with good balance and solid features. |
| Rating Categories | Osprey Sirrus 24 | CamelBak Sequoia 22 | Osprey Tempest 20 | Gregory Jade 28L | Black Diamond Nitro 22L |
| Comfort (25%) | |||||
| Versatility (25%) | |||||
| Weight (25%) | |||||
| Ease Of Use (15%) | |||||
| Durability (10%) | |||||
| Specs | Osprey Sirrus 24 | CamelBak Sequoia 22 | Osprey Tempest 20 | Gregory Jade 28L | Black Diamond... |
| Weight (oz) | 41 | 36 | 26 | 42 | 31 |
| Volume/Capacity (liters) | 24 | 22 | 20 | 28 | 22 |
| Back Construction | Ventilated tensioned mesh | Ventilated back panel with molded pods | AirScape backpanel; large spaced padding covered by large-holed mesh | Crossflow suspension | OpenAir backpanel; ridged foam covered by large mesh |
| Hydration | Internal hydration sleeve | External hydration sleeve and 3L Crux reservoir included | External hydration sleeve | Internal hydration sleeve | External hydration sleeve |
| Hipbelt | Yes | Yes | Yes | Yes | Yes |
| Compartments | 1 | 2 | 1 | 1 | 1 |
| Rain Cover | Yes | No | No | Yes | No |
| Additional pockets | 5 | 7 | 8 | 6 | 5 |
| Outside Carry Options | Trekking pole attachment, ice axe loop, side strech pockets | Trekking pole and ice axe attachments, side pocket, hip belt pockets (one zip), daisy chain, 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 | External stretch pocket, trekking pole holders, ice axe attachement, sunglasses loop and bungee, hip belt pockets, hydration hose clip | Ice axe loops, dual 5-loop daisy chains, expandable side drink pockets, front stuff pocket, hip belt pocket, small zippered top pocket, four shoulder strap loops |
| Whistle | Yes | No | Yes | Yes | Yes |
| Key Clip | Yes | Yes | Yes | Yes | Yes |
| Materials | 210D nylon body, 420D nylon bottom | 200D ripstop nylon, 400D plain-weave nylon | 70D x 100D nylon body, accent and bottom 420HD nylon packcloth | 210D nylon body, 420D nylon bottom | 210D ripstop nylon, 210D Dobby Abrasion |
| Notable Features | Integrated rain cover, ice axe loop, trekking pole attachment, adjustable back | Hydration bladder included, multiple pockets in both hip belts, internal storage pockets, exterior pocket felt-lined | Helmet attachment, trekking pole quick-stow, sunglasses quick-stow, bike light loop, shoulder strap pocket, stowable ice axe loops | Adjustable torso length, internal pocket, cinch straps, sunglasses quick-stow | Bike light loop, main zip opens all the way down, ReActiv shoulder straps connect to each other behind the waist and waist belt not attached to frame to facilitate twisting, front expandable pocket reinforced with internal structural foam panels |
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Our Analysis and Test Results
The Osprey Sirrus 24 is made with 210D nylon with 420D nylon on the bottom. It comes loaded with many great features, including a rain cover and open mesh back design.
Performance Comparison
Checking out the Yellowstone river in the Sirrus. This pack is loaded with features for a variety of day hiking uses.
Comfort
This pack received a high score for comfort. There's ample padding on the shoulder straps, though not quite as much on the hip belt. The suspended mesh back design is comfortable and kept the air circulating. No more soaking wet shirt! The hipbelt didn't fit us very well though, and that affected our comfort a bit. We'd tighten it down around our hips, but as soon as we started moving it would ride up to our waist. This goes to show that it's not enough to try a pack on in the store to see if the torso length fits — you should always load it up and walk around a few minutes to see if everything else works for you as well. If you like the open mesh back concept but still want some padding on your lumbar area, the Gregory Jade 28 provides just that and is more comfortable than the Sirrus.
We really liked the suspended mesh frame on this pack. It helps air circulate and keep any bulky items in your pack off of your back.
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 stowage 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.
Weight
At 41 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. But for what you get, we think the weight is justified.
Ease of Use
We think that overall this pack is fairly easy to use, with long zippers and decent organization for on the go. It 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 most adjustable packs in our review group. However, we are disappointed by the adjustability of the hip belt. It barely wraps around our testers' hip bones, and they are a size 2 and 4, so if your hips are any larger, you might not get great coverage with the hip belt.
The hipbelt just barely reached around our hips, and we're not that big! It also kept riding up onto our waist, which was not that comfortable.
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 210D nylon in the body (many other packs in this review use only 100D nylon, which won't hold up as well to spiky plants and sharp rocks) and there is a 420D 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).
The lighter green material on the bottom and sides is much thicker than the rest of the pack for extra durability.
Value
This is one of the more expensive packs in this review, but considering all of the features, extras, and level of comfort that you get along with the durability, we think it's worth the price.
Checking out Yellowstone Falls on a wet day. The pack cover kept our snacks and extra layers dry. The Sirrus is a great choice if you live in a wet climate, or need extra space for your kids' gear as well.
Conclusion
There's a lot to like about the Osprey Sirrus 24. It's a comfortable daypack with a great back design that improves airflow without sacrificing comfort or support. We are not a big fan of the hip belt, which kept riding up onto our waist and is sized rather small, but there's a lot of variability in women's hips, and it might just fit you better than us.
— Cam McKenzie Ring