Comfort & Support
Organization
Weight
Durability
Water Resistance
Sustainability
Weight
2 lb. 8.9 oz.
Capacity
35L (18L)
Hipbelt
Mesh
Suspension
Framesheet
Pros
Cons
Arc'teryx Aerios 35
The Arc’teryx Aerios 35 earns high marks for both comfort and support thanks to its unique blend of a running vest-style chest harness and a backpack-style internal frame with a hipbelt. The harness ensures a body-hugging fit, while the frame prevents sagging and evenly distributes weight across the hips and shoulders. For those accustomed to frameless running-vest-style packs that often lack a hipbelt, the Aerios offers a welcome upgrade in stability and load-bearing capability.
On my first outing with the Aerios, I covered about seven miles in the North Cascades over highly varied terrain, including rocky off-trail sections, bushwhacks, and river crossings. While Arc’teryx doesn’t list a weight capacity for the pack, I carried around 20 pounds of hiking and camera gear—no small load for a daypack. The Aerios handled it comfortably, with no noticeable pressure points. While the hipbelt might feel excessive for lighter loads, it adds significant value when hauling gear for big days on the trail, cragging, mountaineering, or even fastpacking with overnight essentials. Overall, the Aerios is a standout daypack for those who like to move far and fast with a streamlined yet supportive setup.
The Aerios provides a generous 35 liters of storage, including a mesh hydration bladder pocket and a small zippered compartment inside, plus plenty of external storage options. It features two trekking pole attachment points and two large chest pockets that easily accommodate soft flasks, bear spray, sunglasses, or a phone. Additionally, its roll-top closure allows for an extra 10 liters of capacity, expanding the pack to a potential 45 liters—useful for those needing extra space on longer outings.
While the exterior storage is well thought out in many ways, it does fall short in a few key areas. The two side pockets are functional for Nalgenes but could be deeper for better security. The hipbelt features only one zippered mesh pocket, which feels like a missed opportunity for additional on-the-go storage. Additionally, the pack’s front face lacks a large shove-it pocket—typically ideal for stashing layers and snacks—and instead uses a crisscrossed bungee, which isn't as convenient. While the running vest-style harness is a highlight, a version that integrates more fully with the pack body, similar to the Black Diamond Distance 22 or Salomon ADV Skin, could improve stability and add more front storage. One of our editors also noted that a dedicated, bounce-free bear spray holster would be a welcome addition, especially for fast-moving missions in grizzly country where keeping both chest pockets free for hydration is a priority.
The Aerios 35 tips the scales at just over two and a half pounds, making it a bit on the heavy side for a daypack—especially given its fast-and-light branding. At first glance, this weight seems surprising, particularly when compared to other running vest-style packs like the Black Diamond Distance 22, which weighs just 14.5 ounces and packs down small enough to double as a summit pack on backpacking trips (read our review of the BD Distance 22). However, the extra pound and a half is well justified by the Aerios’ significantly greater support and 13 additional liters of capacity. While we wouldn’t recommend this pack for true speed-focused pursuits—its rigid frame and heft are more of a hindrance than a help in that realm—it’s a great alternative to a traditional framed daypack, offering more on-the-go storage and a snug, body-hugging fit.
Durability is one of the Aerios’ standout qualities. The pack is constructed with Arc’teryx’s proprietary Hadron Liquid Crystal Polymer (LCP), a 200-denier ripstop fabric designed to withstand serious wear and tear. The Hadron material has a distinct feel—slightly rough due to the ripstop pattern but not abrasive to the touch. Compared to Dyneema, which is smooth and almost silky, Hadron LCP is more structured and rigid. This rigidity enhances durability, making the fabric less prone to stretching or deforming under stress, while also adding a sense of security against punctures and abrasions.
Despite its toughness, the Hadron fabric remains relatively thin, contributing to the lightweight design of the Aerios 35. This thinness also allows the pack to compress easily when empty or partially filled. The zippers and buckles are high-quality and feel built to last. That said, I have minor concerns about long-term durability in a few areas. The mesh on the hipbelt and hydration bladder sleeve could be potential weak points, though they’ve held up well so far. Similarly, the front webbing and sternum straps are on the thinner side—while they’ve performed fine in testing, they could be vulnerable to wear over time.
The Aerios’ Hadron LCP fabric, treated with a durable water-repellent (DWR) finish, provides solid water resistance—perfect for handling mildly inclement weather. In my experience, the fabric does a good job of repelling moisture. A not-so-happy accident put this to the test when a La Croix can ruptured inside my pack. All the liquid pooled inside, yet none leaked out, proving how well-sealed the pack is. After that explosion, I took things further by holding the bag under a shower stream for five minutes to simulate heavy rain. Drops beaded up on the outside, and while the interior felt slightly damp to the touch, no significant water seeped in. However, the side pockets were completely soaked.
I’d feel comfortable taking this pack out in light rain or even a brief downpour. Its roll-top design and water-resistant fabric make it a step up from Black Diamond’s Distance series and a touch below the Hyperlite Elevate. That said, if you expect prolonged exposure to heavy rain, extra precautions are necessary—whether that means packing gear in dry bags or using a dedicated rain cover. Arc’teryx offers rain covers that provide an extra layer of defense, but if you’re heading into truly stormy conditions, you might want to rethink your plans entirely.
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Longevity
Choosing durable outdoor gear is perhaps the most effective way to reduce environmental impact—the longer it lasts, the less it needs to be produced. Our proprietary longevity rating evaluates overall build quality based on factors such as materials, fabric denier, component durability (including zippers and toggles), real-world performance as reported by our field testers, and our experiences with the brand.
PFAS-Free DWR
This product’s DWR (Durable Water Repellent) finish is made without per- and polyfluoroalkyl substances (PFAS). These synthetic compounds are known as "forever chemicals” because they take an extremely long time to degrade, if at all. PFAS can eventually end up in everything from soil to drinking water and have been linked to a range of health issues.
Recycled Materials
This product is made partly or entirely from recycled materials, the most common being nylon, polyester, wool, and down. Some products include a single recycled component or partially recycled fabric, while others are 100% recycled (generally excluding accessories like zippers, Velcro, toggles, etc). Look for these details in our product sustainability report linked below.
Bluesign Approved
Bluesign Technologies, based in Switzerland, is a third-party textile certification system that ensures materials are manufactured to strict environmental and worker safety standards. A Bluesign-approval denotes that some of the product’s materials have gone through a rigorous vetting process. A Bluesign Product goes the next mile: These contain more than 90% Bluesign-approved fabrics and more than 20% Bluesign-approved accessories.
Responsible Manufacturing
This criterion evaluates this brand's commitment to fair wages, safe working conditions, and reducing its environmental impact throughout the production process. Responsible manufacturing is most commonly demonstrated through certifications and membership in programs such as Fair Trade Certified, Fair Wear Foundation, Worldwide Responsible Accreditation of Production, and the Fair Labor Association. We also recognize brands that prioritize local production, such as those that manufacture primarily in the United States or Europe, to reduce carbon emissions, maintain better oversight of working conditions, and comply with strict social and environmental regulations.
Recycled and/or Reduced Packaging
This brand uses recycled packaging and/or is making efforts to reduce packaging altogether. For example, it may use a certain percentage of recycled cardboard or make efforts to use less plastic across its packaging operation. In some cases, brands also use Forest Stewardship Council-certified paper products, which helps to ensure sustainable sourcing of forest materials.
Repair Services
This brand offers repair services, which can extend this product's lifespan and reduce overall consumption. Some brands offer comprehensive repair programs that can fix a wide range of issues, while others have more limited capabilities. If a brand's warranty policy only covers replacement, rather than repair, these programs usually do not meet this criterion.
Resale and/or Recycling Services
This brand has a resale and/or recycling program, which helps keep gear in circulation for longer and out of landfills. The most common form is a trade-in program, where consumers can exchange items for store credit, which is then resold. Some brands accept products back for recycling at the end of their life, thereby reducing waste. Occasionally, some do both.
Carbon Footprint Tracking
This criterion evaluates whether this brand measures its greenhouse gas emissions, along with its commitment to reduction and transparency in reporting. Typically, we require brands to follow established frameworks such as the Higg Index, Greenhouse Gas Protocol, or The Change Climate Project. Generally, companies use the widely recognized scope categorization system for measuring brand emissions.
Annual Impact Report
This brand produces and publishes an annual impact report for public consumption, tracking its environmental footprint and sustainability efforts. These reports vary in form but generally cover topics such as material sourcing, greenhouse gas and emissions tracking, waste and water usage, supply chain analysis, and packaging efforts. An impact report is an important step toward transparency and accountability on the sustainability front.
The Aerios 35 comes in Short, Regular, and Tall sizes, and I opted for my usual: a Regular. Arc’teryx provides a straightforward sizing chart, and I found the pack fit my body well. One standout feature is the two-point harness adjustment system on the front shoulder straps, which made dialing in a customized fit easy. The thin, hook-style sternum straps also offer ample adjustability. The Aerios’ hipbelt accommodates waists from 25 to 50 inches, providing a wide range of fit options.
Osprey Talon Velocity 30 ($200): A More Dialed Vest/Daypack Hybrid
The Talon Velocity 30 and Arc’teryx Aerios share a similar blueprint—both are high-capacity daypacks with running vest-style harnesses—but Osprey’s execution feels more focused. At 2 pounds 2.4 ounces, it’s almost half a pound lighter than the Aerios, and that weight savings, combined with its slimmer main compartment and more thoughtfully constructed harness, makes the Talon Velocity the better pick for speed-focused hikers. The Talon Velocity also wins on organization, featuring two zippered hipbelt pockets and a backside shove-it pocket—a key feature the Aerios desperately lacks. Where the Aerios pulls ahead is in carrying comfort, thanks to its framesheet/aluminum stay combo, which is more supportive than the Talon Velocity’s framesheet-only design. But at 25% more expensive, the Aerios asks a lot for that extra support. If you’re looking for a true running/hiking hybrid, the Talon Velocity is the clear winner. For more, read our women's Tempest Velocity 30 review.
Black Diamond Distance 22 ($200): Go All-In on Speed
Not looking for the capacity of the Aerios or Talon Velocity but still want a running vest-style pack? The Distance 22 delivers, offering easy water and snack access with one of the best-designed multipocketed chest harnesses out there. Its smaller size and lighter weight encourage minimalist packing and high-mileage days, and at nearly three times lighter than the Aerios, it still provides impressive comfort—even with a decent amount of weight (though it can't support loads as well as the Aerios). It also packs down well into a larger backpacking rig, making it a great secondary pack for single-day outings on extended trips. At $200, the Distance isn’t cheap for a 22-liter pack, but its technical performance more than justifies the price. For more, read our review of the Distance 22.
The Aerios is an interesting mishmash of a pack, featuring elements of a running vest paired with a supportive suspension and a large capacity. This pack is plenty comfortable, but its priorities are a bit confusing and it’s super expensive.
Comfort & Support
Organization
Weight
Durability
Water Resistance
Sustainability
A speed-oriented pack that takes some inspiration from running vests, the Talon Velocity 30 is made for hikers who think “snack break” is an offensive term. This specialized model’s relative lack of structure and support and its high price tag might be offputting for more casual adventurers.
Comfort & Support
Organization
Weight
Durability
Water Resistance
Sustainability
The Distance wants to turn you into a mountain-eating speed demon. This light pack has storage for every gel packet and wicking layer you possess, and its beefy running vest-style harness hugs it close to your body on scrambles and trail runs. Make sure not to overload what little support it offers, though.
Comfort & Support
Organization
Weight
Durability
Water Resistance
Sustainability
The Arc'teryx Aerios 35 is one of our favorite daypacks for those who want the body-hugging fit and on-the-go convenience of a running vest with the support and capacity of a serious hauler. It’s not built to carry an elk quarter, but it excels when loaded with climbing gear, liters of water, extra layers, or camera equipment. The roll-top closure adds an extra 10 liters of space, making it a viable option for ultralight backpackers as well.
That said, the Aerios 35 is overkill for minimalist day hikes—most hikers prefer something in the 15- to 25-liter range—and it’s too structured for running. It also doesn’t pack down well into a larger backpacking pack, limiting its versatility as a secondary summit bag. But if the price doesn’t deter you, the Aerios offers a premium hybrid design with the support needed for long, demanding days.
happy, happy trails
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