The Osprey Sirrus 24 is a great daypack that came 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 the only packs in this review to do so. Ultimately, we slightly preferred our Editors' Choice winner, the CamelBak Sequoia 22 over this model, as we got a better fit in it than this one. However, if the Sirrus fits you well you're sure to love all the great features it contains.
Osprey Sirrus 24 Review
Compare prices at 3 resellers Pros: Comfortable, well-ventilated, adjustable torso length, included rain cover
Cons: Heavy, ill-fitting hipbelt
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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.
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.
The Sirrus is loaded with features. 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.
At 41 ounces, this is one of the heaviest packs in our review. The open mesh back requires a frame, 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, check out the Mammut Lithia Speed 15. Osprey also has a new lightweight series that we liked called the Hikelite 18.
We had mixed feelings about the adjustability of this pack. 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 were disappointed by the adjustability of the hip belt. It barely covered 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 Lowe Alpine Aeon ND20 also has an adjustable back, and its hip belt offers more coverage and stays in place better.
The Sirrus impressed us the most for durability, and we gave it top marks for this category. It's made with a heavier 210D nylon in the body (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).
This pack is a great option for a variety of uses. If you live in a wet climate, the rain cover has you "covered." If you hike a lot in the summer or live in a warmer part of the country, the open mesh back will help keep you cooler. It can hold a good amount of gear as well, so if you tend to take a lot on your day hikes or are heading out with young kids and need to carry their extra layers and food for them, this pack is a great choice.
At $130, this is one of the more expensive packs in this review. Considering all of the features that you get along with the durability, we think it's worth the price, but if you're on a budget or looking to save a few dollars, check out our Best Buy winner, the REI Co-op Trail 25, which retails for $80.
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