Big Agnes Copper Spur UL2 vs NEMO Dagger OSMO 2P Tent

Editorial Team
Last modified at May 17, 2026
When it comes to backpacking tents, the Big Agnes Copper Spur UL2 and NEMO Dagger OSMO 2P are two of the most popular options on the market. Both tents offer a blend of lightweight design, durability, and comfort, making them ideal for long-distance backpacking trips. However, they have distinct differences that cater to different needs and preferences.

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Big Agnes Copper Spur UL2NEMO Dagger OSMO 2P Tent
Big Agnes Copper Spur UL2NEMO Dagger OSMO 2P Tent
Weight

2.82 lb

2-Person: 3 lb 5 oz 3-Person: 3 lb 13 oz

Floor Area

29 sq ft

2-Person: 30.6 sq ft 3-Person: 42.8 sq ft

Number Of Doors

2

2

Material

ultralight nylon double rip-stop fabric

Canopy: Polyester/ No-see-um mesh Rainfly: OSMO™ Ripstop Floor: OSMO™ Ripstop

Stakes

eight 6 in. Dirt Dagger™ UL stakes

Included

Warranty

limited warranty against manufacturing or material defects

Adventure Forever Guarantee™

Vestibule Size

9 + 9 sq ft

12.1 sq ft

Pole System

DAC Featherlite NFL, NSL and pressfit poles

DIAPOLE™ premium anodized aluminum poles

Packed Dimensions

19.5 × 4 in

2-Person: 20.0 × 6.5 × 3.5 in 3-Person: 20.0 × 7.0 × 3.5 in

Number Of Vestibules

2

2

Headroom

40 in

2-Person: 43 in 3-Person: 44 in

Fabric Type

Proprietary HyperBead™ fabric; 15D nylon with 20D solution dyed ripstop

OSMO™ Ripstop

Zipper Placement

dual zippers

Dual zippers on rainfly

Durability

Big Agnes Copper Spur UL2

4.4/ 5.0

NEMO Dagger OSMO 2P Tent

3.8/ 5.0

Durability is crucial for backpacking tents as it ensures the tent can withstand various weather conditions and rough handling over time. A more durable tent means fewer worries about tears or damage during your trips, providing a reliable shelter in the wilderness. The Big Agnes Copper Spur UL2 excels in durability with its reinforced materials like injection-molded poles and tip-lock buckles, which hold up well in wind and rain. It has a strong rating of 4.4/5, with users praising its sturdy structure and high-quality materials. On the other hand, the NEMO Dagger OSMO 2P, while still durable with premium fabrics and components, has a lower rating of 3.8/5. Some users have reported minor issues with long-term wear, making it slightly less reliable in harsh conditions. For those prioritizing durability, the Copper Spur UL2 is the clear winner.

Comfort

Big Agnes Copper Spur UL2

4.4/ 5.0

NEMO Dagger OSMO 2P Tent

4.9/ 5.0

Comfort is essential for a pleasant backpacking experience, especially on extended trips where you spend significant time in your tent. A comfortable tent provides ample living space, good headroom, and thoughtful storage solutions. The NEMO Dagger OSMO 2P shines in this category with a rating of 4.9/5, offering ample living space and generous peak height, making it exceptionally comfortable for two people. Users appreciate its roomy interior and comfortable space, which enhance the overall camping experience. The Big Agnes Copper Spur UL2, while still comfortable with a rating of 4.4/5, falls slightly short in comparison. It offers excellent headroom and storage pockets but doesn't quite match the spaciousness of the Dagger OSMO 2P. If comfort is your top priority, the NEMO Dagger OSMO 2P is the better choice.

Weather Resistance

Big Agnes Copper Spur UL2

4.6/ 5.0

NEMO Dagger OSMO 2P Tent

3.8/ 5.0

Weather resistance is a critical factor for backpacking tents, as it determines how well the tent can protect you from rain, wind, and other elements. A tent with good weather resistance ensures you stay dry and comfortable in various conditions. The Big Agnes Copper Spur UL2 has a strong rating of 4.6/5 in this category, with users praising its rain fly and waterproof fabric that keep you dry even in heavy downpours. While there are minor reports of seepage in extreme conditions, it generally performs well. The NEMO Dagger OSMO 2P, with a rating of 3.8/5, offers a double-wall design and waterproof barrier but has more mixed reviews regarding condensation and water repellency. Some users note issues with condensation in humid conditions, making it slightly less reliable in wet weather. For better weather resistance, the Copper Spur UL2 is the preferred option.

Ventilation

Big Agnes Copper Spur UL2

4.2/ 5.0

NEMO Dagger OSMO 2P Tent

3.9/ 5.0

Proper ventilation is important to reduce condensation and maintain a comfortable interior climate. Good ventilation helps manage airflow and keeps the tent interior dry and pleasant. The Big Agnes Copper Spur UL2 has a rating of 4.2/5, with mesh panels and a breathable design that reduce condensation. However, some users found airflow slightly limited in humid conditions. The NEMO Dagger OSMO 2P, with a rating of 3.9/5, offers full mesh panels and adjustable vents but also has mixed reviews regarding ventilation. Some campers suggest propping open the door for better circulation, indicating that it might not be as effective in managing airflow. While both tents have their strengths and weaknesses, the Copper Spur UL2 slightly edges out the Dagger OSMO 2P in ventilation.

Ease Of Setup

Big Agnes Copper Spur UL2

4.8/ 5.0

NEMO Dagger OSMO 2P Tent

4.6/ 5.0

Ease of setup is a key consideration, especially after a long day on the trail when you want to quickly pitch your tent and relax. A tent that is easy to set up saves time and reduces frustration. The Big Agnes Copper Spur UL2 excels in this category with a rating of 4.8/5. Its freestanding design and intuitive pole connections make it one of the quickest tents to pitch, even for beginners. The NEMO Dagger OSMO 2P also performs well with a rating of 4.6/5, offering a freestanding design with intuitive clips and poles. However, it is slightly less straightforward compared to the Copper Spur UL2. For those who value ease of setup, the Big Agnes Copper Spur UL2 is the clear winner.

Weight

Big Agnes Copper Spur UL2

4.7/ 5.0

NEMO Dagger OSMO 2P Tent

4.7/ 5.0

Weight is a crucial factor for backpackers who need to carry their gear over long distances. A lighter tent reduces the overall load, making it easier to travel further and faster. Both the Big Agnes Copper Spur UL2 and the NEMO Dagger OSMO 2P are lightweight options, with the Copper Spur UL2 weighing in at 2.82 lb and the Dagger OSMO 2P at 3 lb 5 oz for the 2-person variant. The Copper Spur UL2 is slightly lighter, making it a better choice for those who prioritize minimizing weight. However, the difference is not substantial, and both tents are suitable for long-distance backpacking. In this category, it's a tie as the weight difference is minimal and may not significantly impact the overall backpacking experience.

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Conclusion & Final Verdict:

After comparing the Big Agnes Copper Spur UL2 and NEMO Dagger OSMO 2P tents across various categories, it's clear that both tents have their strengths and weaknesses.

  • Choose the Big Agnes Copper Spur UL2 if you prioritize durability, weather resistance, ventilation, ease of setup, and lighter weight. It's an excellent all-around tent that performs well in various conditions and is easy to set up, making it ideal for long-distance backpacking.

  • Choose the NEMO Dagger OSMO 2P if you value comfort and space. It offers a more spacious interior and better headroom, making it a great choice for those who want a roomier tent for extended trips.

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