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Osprey Aura AG 65L Women's Backpacking Backpack vs ULA Equipment ULA Circuit Backpack

Editorial Team
Last modified at August 9, 2026
Choosing the right backpacking backpack can significantly enhance your outdoor experience. The Osprey Aura AG 65L and the ULA Circuit are both excellent choices, but they cater to different needs. The Osprey Aura AG 65L is renowned for its ventilation and organization, while the ULA Circuit stands out for its fit and load transfer capabilities.

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Osprey Aura AG 65L Women's Backpacking BackpackULA Equipment ULA Circuit Backpack
Osprey Aura AG 65L Women's Backpacking Backpack
ULA Circuit Backpack
Capacity

WXS/S: 62 L; WM/L: 65 L

68 L total: 39.3 L main body; 6.6 L front; 6.6 L each side; 8.2 L collar; 1.5 L each hipbelt pocket

Weight

WM/L: 4.6 lb
WXS/S: 4.5 lb

2 lb 6.5 oz (38.5 oz)

Torso Adjustability

WXS/S: 13–17 in; WM/L: 16–20 in

SMALL: 15–18 in
MEDIUM: 18–21 in
LARGE: 21–24 in
X-LARGE: 24+ in

Hip Belt Size Range

26–41 in

X-SMALL: 26–30 in
SMALL: 30–34 in
MEDIUM: 34–38 in
LARGE: 38–42 in
X-LARGE: 42–47 in
XX-LARGE: 47+ in

Hydration Compatibility

Yes

Yes; hydration port, optional sleeve

Warranty

All Mighty Guarantee

Lifetime (original owner, defects in materials and workmanship)

Trekking Pole Attachment

Yes

Yes (Ice Axe/Trekking Pole Loops)

Rain Cover Compatibility

Included

Compatible; sold separately

Side Pockets

Yes

Yes (each accommodates two 1-Liter bottles)

Hip Pockets

Yes

Yes (Dual Hipbelt Pockets)

Sternum Strap

Yes

Yes (Removable & Height Adjustable)

Load Lifters

Yes

Yes (adjustable)

Sleeping Bag Compartment

Yes

No separate compartment; roll-top main body

Comfort

Osprey Aura AG 65L Women's Backpacking Backpack

3.6/ 5.0

ULA Circuit Backpack

4.2/ 5.0

Comfort is crucial for long hikes, as it directly impacts your endurance and enjoyment. A comfortable backpack ensures that you can carry your gear without experiencing discomfort or pain. The ULA Circuit excels in comfort with a fully padded back panel and shoulder straps, making it a better choice for those who prioritize comfort on long trails. The Osprey Aura AG 65L, while comfortable, has a lower comfort score due to some issues with the hip belt causing rubbing or bruising under heavy loads. Therefore, if comfort is your top priority, the ULA Circuit is the better option.

Fit

Osprey Aura AG 65L Women's Backpacking Backpack

4.1/ 5.0

ULA Circuit Backpack

4.7/ 5.0

A good fit ensures that the backpack stays secure and comfortable on your body, reducing the risk of strain or injury. The ULA Circuit offers a superior fit with adjustable shoulder straps and a height-adjustable hip belt, making it adaptable to various body shapes. The Osprey Aura AG 65L also provides a good fit with adjustable features, but it doesn't match the customization options of the ULA Circuit. For those who need a precise and adjustable fit, the ULA Circuit is the clear winner.

Load Transfer

Osprey Aura AG 65L Women's Backpacking Backpack

4.1/ 5.0

ULA Circuit Backpack

4.7/ 5.0

Effective load transfer is essential for distributing weight evenly and reducing strain on your back and shoulders. The ULA Circuit shines in this category with its four-point contact hip belt system and load lifters, which help spread the weight out very well. The Osprey Aura AG 65L also performs well with its Anti-Gravity suspension system, but it doesn't quite match the load transfer capabilities of the ULA Circuit. If you're carrying heavy loads, the ULA Circuit will provide better support and comfort.

Ventilation

Osprey Aura AG 65L Women's Backpacking Backpack

4.6/ 5.0

ULA Circuit Backpack

2.8/ 5.0

Proper ventilation helps keep you cool and dry, especially during strenuous hikes in warm weather. The Osprey Aura AG 65L excels in ventilation with its mesh back panel and excellent breathability, making it ideal for hot climates. The ULA Circuit, on the other hand, has poorer ventilation, which can lead to back sweating. If you're hiking in warm conditions, the Osprey Aura AG 65L is the better choice for keeping you cool and comfortable.

Organization

Osprey Aura AG 65L Women's Backpacking Backpack

4.7/ 5.0

ULA Circuit Backpack

4.7/ 5.0

Good organization makes it easier to access your gear quickly and efficiently. Both the Osprey Aura AG 65L and the ULA Circuit score highly in organization, with multiple pockets and compartments for easy access to your gear. The Osprey Aura AG 65L has a slight edge with its zippered sleeping bag compartment and multiple access points, but the difference is minimal. If organization is a top priority, both backpacks will serve you well.

Accessibility

Osprey Aura AG 65L Women's Backpacking Backpack

3.9/ 5.0

ULA Circuit Backpack

4.2/ 5.0

Easy access to essentials like snacks, water, and rain gear can make your hike more enjoyable. The ULA Circuit offers better accessibility with its side pouches and pockets, making it easier to reach your essentials without having to dig through your pack. The Osprey Aura AG 65L also provides good accessibility with its hip belt pockets and side pockets, but it doesn't match the convenience of the ULA Circuit. For quick access to your gear, the ULA Circuit is the better option.

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Conclusion & Final Verdict:

In conclusion, the Osprey Aura AG 65L and the ULA Circuit are both excellent backpacking backpacks, but they cater to different needs. If you prioritize ventilation and organization, the Osprey Aura AG 65L is the better choice. On the other hand, if fit, load transfer, and accessibility are your top priorities, the ULA Circuit is the clear winner. Consider your specific needs and preferences to make the best choice for your outdoor adventures.

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