ULA Equipment ULA Circuit Backpack vs Deuter Aircontact Core 45+10 SL
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- Side-by-side analysis based on real user feedback
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| ULA Circuit Backpack | Deuter Aircontact Core 45+10 SL | |
|---|---|---|
![]() | ![]() VS | |
| Capacity | 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 | 45+10 L (55 L expanded) |
| Weight | 2 lb 6.5 oz (38.5 oz) | 4 lb 12.5 oz (2,170 g) |
| Torso Adjustability | SMALL: 15–18 in | 14–22 in |
| Hip Belt Size Range | X-SMALL: 26–30 in | Not specified by current US manufacturer or retailer |
| Hydration Compatibility | Yes; hydration port, optional sleeve | Yes; up to 3 L reservoir |
| Warranty | Lifetime (original owner, defects in materials and workmanship) | deuter USA lifetime warranty |
| Trekking Pole Attachment | Yes (Ice Axe/Trekking Pole Loops) | Yes |
| Rain Cover Compatibility | Compatible; sold separately | Compatible; not included on current US model |
| Side Pockets | Yes (each accommodates two 1-Liter bottles) | Yes |
| Hip Pockets | Yes (Dual Hipbelt Pockets) | Yes |
| Sternum Strap | Yes (Removable & Height Adjustable) | Yes (2-way adjustable) |
| Load Lifters | Yes (adjustable) | Yes |
| Sleeping Bag Compartment | No separate compartment; roll-top main body | Yes (separate bottom compartment) |
| ULA Equipment ULA Circuit Backpack | Deuter Aircontact Core 45+10 SL |
|---|---|
![]() | ![]() |
| Capacity | |
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 | 45+10 L (55 L expanded) |
| Weight | |
2 lb 6.5 oz (38.5 oz) | 4 lb 12.5 oz (2,170 g) |
| Torso Adjustability | |
SMALL: 15–18 in | 14–22 in |
| Hip Belt Size Range | |
X-SMALL: 26–30 in | Not specified by current US manufacturer or retailer |
| Hydration Compatibility | |
Yes; hydration port, optional sleeve | Yes; up to 3 L reservoir |
| Warranty | |
Lifetime (original owner, defects in materials and workmanship) | deuter USA lifetime warranty |
| Trekking Pole Attachment | |
Yes (Ice Axe/Trekking Pole Loops) | Yes |
| Rain Cover Compatibility | |
Compatible; sold separately | Compatible; not included on current US model |
| Side Pockets | |
Yes (each accommodates two 1-Liter bottles) | Yes |
| Hip Pockets | |
Yes (Dual Hipbelt Pockets) | Yes |
| Sternum Strap | |
Yes (Removable & Height Adjustable) | Yes (2-way adjustable) |
| Load Lifters | |
Yes (adjustable) | Yes |
| Sleeping Bag Compartment | |
No separate compartment; roll-top main body | Yes (separate bottom compartment) |
Comfort
ULA Circuit Backpack
Deuter Aircontact Core 45+10 SL
Comfort is crucial for backpacking backpacks as it directly impacts your endurance and enjoyment on long trails. A comfortable backpack ensures that you can carry your load without straining your back and shoulders, making your journey more pleasant. The Deuter Aircontact Core 45+10 SL excels in this category with a score of 4.4/5, praised for its comfortable fit, flexible hip belt, and lumbar support. Buyers highlight its ability to distribute weight effectively to the hips, reducing shoulder strain. The ULA Circuit Backpack, while still comfortable with a score of 4.2/5, has some complaints about back sweating and mesh comfort. Therefore, if comfort is your top priority, the Deuter Aircontact Core is the better choice.
Fit
ULA Circuit Backpack
Deuter Aircontact Core 45+10 SL
A good fit ensures that the backpack sits correctly on your body, distributing weight evenly and reducing the risk of discomfort or injury. Both the ULA Circuit Backpack and the Deuter Aircontact Core 45+10 SL score highly in this category, with the ULA Circuit slightly ahead at 4.7/5 compared to the Deuter's 4.6/5. The ULA Circuit is praised for its adjustable shoulder straps and height-adjustable hip belt, making it versatile for various body types. The Deuter Aircontact Core is also highly adjustable, with pivoting hip and shoulder strap attachments that cater well to shorter frames. Given the minimal difference in scores and the high adjustability of both packs, this category is a tie.
Load Transfer
ULA Circuit Backpack
Deuter Aircontact Core 45+10 SL
Effective load transfer is essential for reducing strain on your back and shoulders, especially during long hikes with heavy loads. The ULA Circuit Backpack excels in this category with a score of 4.7/5, thanks to its four-point contact hip belt system and load lifters that spread weight effectively. Buyers consistently praise its ability to carry heavy loads comfortably. The Deuter Aircontact Core, with a score of 4.4/5, also performs well but is slightly less effective in distributing weight to the hips. If carrying heavy loads is a priority, the ULA Circuit is the clear winner.
Ventilation
ULA Circuit Backpack
Deuter Aircontact Core 45+10 SL
Proper ventilation helps keep your back cool and dry, enhancing comfort during long hikes, especially in warm weather. The Deuter Aircontact Core 45+10 SL significantly outperforms the ULA Circuit Backpack in this category, with a score of 4.4/5 compared to the ULA's 2.8/5. The Deuter is praised for its three-dimensional air spacer mesh and wide ventilation channel, which keep the back from getting too sweaty. The ULA Circuit, however, has complaints about back sweating and less effective mesh. For better ventilation, the Deuter Aircontact Core is the superior choice.
Organization
ULA Circuit Backpack
Deuter Aircontact Core 45+10 SL
Good organization in a backpack allows for easy access to your gear and helps keep your belongings well-arranged. The ULA Circuit Backpack scores higher in this category with a 4.7/5, praised for its removable straps, cinchable side pockets, and roll-top closure that make packing and accessing gear straightforward. The Deuter Aircontact Core, with a score of 4.3/5, also offers good organization with multiple pockets and attachment loops, but it falls slightly short compared to the ULA Circuit. If organization is a key factor for you, the ULA Circuit is the better option.
Accessibility
ULA Circuit Backpack
Deuter Aircontact Core 45+10 SL
Accessibility refers to how easily you can reach your gear without having to dig through your pack. Both the ULA Circuit Backpack and the Deuter Aircontact Core 45+10 SL score equally in this category with a 4.2/5. The ULA Circuit is praised for its side pouches and pockets, while the Deuter Aircontact Core is noted for its easily adjustable harness and cinch straps. Given the similar scores and positive feedback for both, this category is a tie.
Trust & Transparency
- Data-driven rankings from real user reviews
- Affiliate partnerships don't influence our methodology
We may earn commission from links.
Conclusion & Final Verdict:
In conclusion, the ULA Circuit Backpack and the Deuter Aircontact Core 45+10 SL each have their strengths. The ULA Circuit is the better choice for those who prioritize load transfer, organization, and lighter weight, making it ideal for long trails with heavy loads. On the other hand, the Deuter Aircontact Core excels in ventilation and fit adjustability, making it a great option for those who need better breathability and a more customized fit. Ultimately, your choice will depend on your specific needs and preferences.
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