I own both the Osprey Atmos AG 65 and Aether AG 70 backpacks, using them extensively over the past year. This comparison breaks down the essential differences to help you choose the right pack for your needs.
Overview of Osprey Atmos and Aether
The Osprey Atmos and Aether series are two of the most popular backpack lines from Osprey, a pioneer in the realm of outdoor gear. Each line caters to backpackers with specific needs, offering a tailored backcountry experience. For a comparison of Osprey’s day hiking and technical packs, see Osprey Talon vs. Stratos.
The Osprey Atmos series is renowned for its ventilating suspension system, making it an excellent choice for those who prioritize comfort and breathability. On the other hand, the Osprey Aether series is designed for hauling heavier loads with ease, making it a more robust solution for extended trips.
Key Differences
Volume (65L vs 70L)
The Atmos AG 65 offers 65 liters in the medium size, while the Aether AG 70 provides 70 liters. In practice, this 5-liter difference is minimal for most users. The Atmos ranges from 62L (small) to 68L (large), while the Aether spans 67L (small) to 76L (extra-large).
Weight (4.56 vs 5.21 lbs)
The Atmos AG 65 weighs 4.56 pounds in medium size, making it noticeably lighter than the Aether AG 70 at 5.21 pounds. This weight difference becomes apparent during long days on the trail. The Atmos AG 65 is an ideal lighter pack for shorter hikes and lighter loads. The lighter weight of the Atmos contributes to its reputation as a more versatile pack.
Intended Use Cases
The Atmos AG 65 excels as a versatile backpack for trips ranging from overnight to 5 days. Its lighter weight and superior ventilation make it ideal for three-season backpacking. The Aether AG 70 specializes in extended trips (5+ days), winter expeditions, and carrying heavy loads. Its more substantial frame and additional features support these demanding applications.
Comfort & Suspension
AntiGravity System
Both packs use Osprey’s AntiGravity suspension system, but implement it differently. The Atmos incorporates a full mesh panel extending from the shoulders to the hip belt, creating superior ventilation and comfort. The Aether uses a modified version that prioritizes load capacity over ventilation.
Harness Design
The Atmos features adjustable stiffeners in the shoulder straps, allowing precise fit customization. The Aether lacks these adjustable elements but offers thicker padding. Both harnesses provide excellent comfort, with the Atmos gaining an edge in adjustability and the Aether in durability.
Hip Belt Features
The Atmos uses Osprey’s “fit-on-the-fly” hip belt, offering quick adjustments through an extending pad system. Hip belts are crucial for providing comfort and support during backpacking, ensuring proper weight distribution and reducing strain on the shoulders.
The Aether features a heat-moldable IsoForm hip belt, custom-fitted at Osprey dealers. Both approaches work well, with the Atmos providing more immediate adjustability and the Aether offering a more personalized fit over time.
Load Capacity
The Aether excels with heavy loads, rated for up to 60 pounds versus the Atmos’s 40-pound limit. This difference stems from the Aether’s more substantial frame and thicker materials. For loads under 40 pounds, the Atmos provides equal or better comfort.
Organization
Main Compartment Access and Dedicated Sleeping Bag Compartment
The Atmos offers top loading access with a sleeping bag compartment at the bottom. The Aether adds a front J-zip access panel, making it easier to reach items in the middle of the pack. This additional access point adds convenience but also weight.
Pocket Configuration
The Atmos includes eight external pockets versus the Aether’s seven. The Atmos features two front zippered pockets absent on the Aether, offering quick access to frequently used items. Both packs provide similar hip belt pockets and water bottle holders.
Compression Systems
The Atmos uses dual side compression straps and one internal top strap. The Aether adds two front “straightjacket” compression straps, providing better load stabilization. These additional straps prove useful for attaching gear externally.
Top Lid Features
The Atmos includes dual-pocket top lid organization. The Aether’s top lid converts to a daypack in US models, while international versions include an integrated rain cover instead. Both lids are removable, revealing a secondary FlapJacket cover.
Technical Features
Tool Attachments
Both packs include ice tool loops with bungee tie-downs and Stow-on-the-Go trekking pole attachments. The attachment points are similarly durable and functional across both models.
Hydration Compatibility
Each pack features an external hydration sleeve that accommodates reservoirs up to 3 liters. The sleeve location prevents water weight from compromising load balance.
Raincover
The Atmos includes an integrated raincover in all markets. The Aether’s raincover availability varies by region, included internationally but replaced by the convertible daypack lid in US models.
Size Range
The Atmos comes in three sizes (S/M/L), while the Aether adds an XL option. Both packs offer 4 inches of torso adjustment within each size, ensuring proper fit across body types.
Design and Construction
The Osprey Atmos and Aether series feature high-quality nylon for their construction, ensuring durability and resistance to wear and tear. The nylon is tightly woven and comes with various deniers, which indicate the fabric thickness and, consequently, its durability. The use of these nylons ensures that both backpacks can withstand the rigors of travel and outdoor activity without succumbing to tears or premature wear.
Performance Evaluation
The Osprey Atmos and Aether series are designed to provide exceptional performance in various outdoor activities. The Atmos series features an Anti-Gravity suspension system, which distributes weight evenly and increases airflow, making it suitable for shorter trips and lighter loads. On the other hand, the Aether series features a more traditional suspension system, which focuses on distributing heavier loads efficiently, making it suitable for longer trips and heavier loads.
Multi-Day Trips and Camping
The Osprey Aether is designed for heavy load management on multi-day trips. The Aether features a robust suspension system that eases the burden on shoulders and hips, making it an excellent choice for backpackers who need to carry heavy loads for extended periods.
The Aether also features adjustable torso lengths and an interchangeable hip belt for a custom fit, ensuring that the backpack stays comfortable even on long trips. Additionally, the Aether has a dedicated sleeping bag compartment with its own zipper at the base, making it easy to access and store sleeping gear.
Recommendations
Choose Atmos For
Select the Atmos AG 65 for three-season backpacking, trips under 5 days, and loads under 40 pounds. Its lighter weight, superior ventilation, and versatile pocket configuration make it an excellent all-around pack.
Choose Aether For
Pick the Aether AG 70 for extended trips, winter expeditions, and loads over 40 pounds. Its stronger frame, additional access points, and convertible top lid suit demanding applications and longer journeys.
Value Assessment
The Atmos AG 65 costs $400, while the Aether AG 70 retails for $600. The Atmos provides better value for most users, offering sufficient features for typical backpacking needs. The Aether’s premium reflects its specialized capabilities and extra features, justified only for specific use cases.