Nemo Dagger Osmo 2P Backpacking Tent Review
The updated Nemo Dagger Osmo 2P ($600) is built for backpackers who prioritize livability, with a roomy rectangular floor that easily fits two adults, an impressively tall peak height, and excellent gear storage via oversized vestibules. It’s also intuitive to pitch and highly weather-protective, thanks to a sturdy pole structure and full-coverage rainfly. That said, it’s heavier and pricier than many competitors, including others in Nemo’s lineup. But if you can justify the weight, the Dagger remains one of the most well-rounded and livable backpacking tents available.
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
Design Type
Freestanding
Packaged weight
3 lb. 15 oz.
Floor Area
30.6 sq. ft.
Floor dimensions
88 x 50 in.
Peak height
43 in.
Floor Fabric
Osmo
Capacities
2, 3P
Pros
Cons
Nemo Dagger Osmo 2P
For this season's top models, see our guide to the Best Backpacking Tents.
For a sub-4-pound tent, the Nemo Dagger Osmo 2P offers outstanding livability. Its symmetrical 88-by-50-inch floor is spacious for two and avoids the common foot-end taper found on many backpacking tents. With 30.6 square feet of space, it beats out similarly built models like the Big Agnes Copper Spur UL2 (29 sq. ft., tapered) and Nemo’s own Hornet Osmo 2P (27.5 sq. ft.). We comfortably fit two 25-inch-wide pads side by side (a rarity for a backpacking tent) with room left at the foot for gear, and appreciated the vertical sidewalls, prebent poles, and dual-hub pole system, which kept the space feeling upright and usable—especially at the head and shoulders.
The peak height of 43 inches is among the best in the lightweight category, just a half inch behind the Sea to Summit Telos. It’s a full 3 inches taller than the Hornet and noticeably roomier than the Copper Spur (40 in.). At 6’3”, I was able to sit upright without issue. Compared to the previous Dagger, the new Nemo Dagger Osmo 2P fabric helps the tent pitch crisper and tighter, lending a slightly more open, less sag-prone ceiling. In short, it’s one of the most livable lightweight backpacking tents out there.
At 3 pounds 15 ounces all in, the Nemo Dagger Osmo 2P isn’t winning any awards for ultralight cred, especially stacked against competitors like the Big Agnes Copper Spur UL2 (3 lb.), Nemo Dragonfly Osmo (3 lb. 2 oz.), or Hornet Osmo (2 lb. 8 oz.). It is a touch lighter than the previous Dagger (4 lb. 2 oz.), but still falls on the heavier side for the premium category. Packed size is similarly average at 20 x 6.5 x 3.5 inches—not oversized, but bulkier than more minimalist designs like the Copper Spur (19.5 x 4 in.).
That said, most of the lighter options come with tradeoffs in headroom, floor space, and overall sturdiness. The Dagger offers more interior volume, a taller peak height, and a freestanding setup—all of which contribute to its extra weight. For $600, we’d prefer it shaved a few ounces, but for backpackers who prioritize comfort and usability over gram-counting, the weight and size are totally manageable and well justified.
With its proprietary Osmo fabric and confidence-inspiring pole structure, the Nemo Dagger Osmo 2P offers solid protection for a sub-4-pound tent. The waterproof Osmo fabric—Nemo’s poly/nylon blend—impressively resists sagging when wet, and in testing during steady rain and wind on Maui’s exposed coast, the fly stayed taut and the interior bone-dry. Full-coverage rainfly protection extends low enough to block wind-driven rain while still allowing for airflow underneath, and both vestibules remained leak-free even in sustained showers.
Wind performance is equally solid. The freestanding, hubbed pole structure gives the Dagger a stable and resilient frame, easily outperforming semi-freestanding competitors like the Big Agnes Tiger Wall or Nemo Hornet, which we’ve seen collapse in gusty conditions. Staked out with guylines, the Dagger feels secure and planted even in strong winds. And thanks to its mostly mesh canopy and fly-end strut vents, we had no issues with condensation buildup—even in muggy, tropical humidity. It’s a strong showing all around for such a livable backpacking tent.
The Nemo Dagger Osmo 2P strikes a strong balance between weight savings and durability. The proprietary Osmo poly-nylon ripstop fabric feels noticeably more robust than typical ultralight materials, with a slightly textured floor that inspires confidence when setting up on abrasive ground. While Nemo doesn’t list denier specs, the fabric seems comparable to 30D options and is a clear step up from thinner competitors like the Big Agnes Copper Spur or MSR Hubba Hubba LT, both of which use lighter, more delicate 20D materials.
The Dagger’s mesh canopy is lightweight but doesn’t feel overly fragile, and overall construction reflects Nemo’s reputation for quality. It’s not bombproof—you’ll still want to avoid the rockiest of sites—but you don’t have to baby it like some ultralight backpacking tents. More rugged options like Dyneema models from Hyperlite or Zpacks offer greater long-term durability but at a much higher price point. For its weight class, the Dagger hits a sweet spot.
The Nemo Dagger Osmo 2P is among the easiest backpacking tents in its class to set up. As a fully freestanding design, it eliminates much of the hassle of choosing a perfect site—unlike semi-freestanding or trekking pole shelters, it doesn't rely on perfectly tensioned stakes or specific configurations to hold its shape. One upgrade in this latest version is the new Axial corner anchors, which simplify setup with one-handed operation and built-in tensioning. Compared to the previous model’s ball-and-socket system, it’s a clear improvement, particularly when pitching solo or in windy weather.
Thanks to clear instructions, improved color-coding, and a slightly crisper Osmo canopy fabric that holds its shape well, the Dagger’s setup process is quick and intuitive. Once familiar with the corner system, I had the tent pitched in just about four minutes—right on par with the previous version, but with less fiddling and more user-friendly design overall.
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Longevity
Choosing durable outdoor gear and keeping it in use for longer is one of the best ways to reduce environmental impact. Our proprietary longevity rating assesses factors like overall build quality, materials, fabric denier, component durability, and real-world performance. A green check indicates that we expect the product to be long-lasting relative to its peers, a yellow check mark indicates average longevity, and a red X indicates a product that may have a limited lifespan.
PFAS-Free DWR
Durable water-repellent (DWR) finishes can contain PFAS (per- and polyfluoroalkyl substances). These highly persistent “forever chemicals” are used in outdoor gear for their strong resistance to water, oil, and heat, but are linked to environmental contamination and a range of health concerns. A green check mark indicates the product uses a PFAS-free DWR, while a red X means the DWR contains PFAS.
Recycled Materials
Recycled materials are prevalent in outdoor gear, with nylon, polyester, wool, and down among the most common, but the composition varies widely. A green check mark indicates the product is made with a substantial amount of recycled materials (100% recycled or the core fabric that makes up most of the product is recycled), a yellow check means it contains a moderate to small amount of recycled materials, while a red X means there are no recycled materials in the product.
Bluesign Approved
Bluesign Technologies, based in Switzerland, operates a third-party textile management system that ensures materials are manufactured to strict environmental, chemical, and worker safety standards. A green check mark indicates a product is either a Bluesign Product (contains at least 90% Bluesign-approved fabrics and 20-30% Bluesign-approved accessories) or features a significant amount of Bluesign-approved materials. A yellow check mark means it uses some Bluesign-approved materials but less than the aforementioned category, and a red X means there are no Bluesign-approved materials in the product.
Solution-Dyed Materials
Solution dyeing adds pigment to synthetic fibers during production rather than afterward, reducing water use, energy consumption, greenhouse gas emissions, and chemical waste, while also creating fabrics that resist fading better over time. A green check mark indicates a product features a substantial amount of solution-dyed materials, a yellow check mark indicates moderate or limited use of solution-dyed fabrics, and a red X indicates there are no solution-dyed materials in the product.
Responsible Manufacturing
This criterion evaluates a brand’s commitment to fair wages, safe working conditions, and reducing environmental impact through certifications and programs like Fair Trade Certified, Fair Wear Foundation, Worldwide Responsible Accredited Production (WRAP), and the Fair Labor Association, while also recognizing brands that manufacture primarily in the U.S. or Europe under strict labor and environmental regulations. A green check mark indicates a brand meets our responsible manufacturing criteria, while a red X means it does not.
Recycled and/or Reduced Packaging
Packaging can add significant waste to outdoor gear purchases, so many brands work to reduce its impact by using recycled materials, incorporating Forest Stewardship Council-certified paper products, and minimizing plastic and paper use. A green check mark indicates a brand uses recycled or reduced materials across all of its packaging, a yellow check indicates moderate or limited use of recycled or reduced packaging, and a red X indicates the brand does not make either of these efforts.
Repair Services
Repair services extend the lifespan of outdoor gear and reduce overall consumption, though programs vary widely. Some brands offer comprehensive repairs for a range of issues, while others provide limited or no repair support. A green check mark indicates a robust repair program, a yellow check mark indicates limited repair services, and a red X indicates the brand does not offer repair services.
Resale and/or Recycling Services
Resale and recycling programs help keep outdoor gear in circulation longer and out of landfills, ranging from trade-in resale platforms that offer store credit to take-back initiatives that recycle products at the end of their usable life. A green check mark indicates a brand offers both resale and recycling programs, a yellow check mark indicates it offers one or the two, and a red X indicates it offers neither.
Carbon Footprint Tracking
This criterion evaluates whether a brand measures, reports, and works to reduce its greenhouse gas emissions using established frameworks such as the Higg Index, Greenhouse Gas Protocol, or The Change Climate Project. A green check mark indicates a brand publicly reports greenhouse gas emissions data, sets clearly defined reduction targets, and uses established tracking frameworks such as Higg or The Change Climate Project. A yellow check mark indicates the brand tracks emissions and outlines reduction goals but provides limited data, lacks science-based verification, or does not clearly report progress. A red X indicates the brand does not appear to track greenhouse gas emissions or provides so little information that its efforts cannot be verified.
Annual Impact Report
Annual impact reports provide transparency and accountability by outlining a brand’s sustainability efforts across areas such as material sourcing, greenhouse gas emissions, waste, water use, supply chains, and packaging. A green check mark indicates a brand publishes a detailed, brand-specific impact report that closely aligns with our sustainability criteria and leaves little room for ambiguity. A yellow check indicates a brand provides some relevant sustainability reporting but lacks detail in key areas or is covered only briefly within a parent company report. A red X indicates a brand does not regularly publish an impact report.
Interior Storage
The Dagger Osmo features four interior pockets: two low on the sidewalls and two Nightlight Pockets near the ceiling that double as diffusers for your headlamp. This layout remains unchanged from the previous version and is functional for small items like a phone, headlamp, or first aid kit. However, we’d like to see Nemo incorporate at least one large pocket to stash bulkier items or layers—something that brands like Big Agnes and MSR do well with their dump-style end-wall pockets. As it stands, interior organization is serviceable, but not standout.
Vestibules
Vestibule storage is a clear high point of the Nemo Dagger Osmo 2P. Each vestibule provides 12.1 square feet of space—a slight but useful bump over the previous version. That’s significantly roomier than alternatives like the Copper Spur (9 sq. ft.), Hornet (7.1 sq. ft.), and Telos (9.75 sq. ft.). Nemo also includes their “Landing Zone,” a waterproof tub that sits inside each vestibule and elevates gear off wet or muddy ground—perfect for wet weather trips. This added functionality makes the Dagger Osmo one of the best options in its class for storing and protecting gear outside the sleeping area.
Big Agnes Copper Spur UL2 ($600): Better Space-to-Weight Ratio
One of the best all-around backpacking tents, the Copper Spur is lighter than the Dagger (3 lb.) yet still offers plenty of space, with a similar 88-inch-long body and 52 inches across at the head. This is basically an ultralight backpacking tent without the typical ultralight squeeze, although the Copper Spur tapers down to 42 inches across at the foot end (something to keep in mind if you use 25-inch-wide pads). Some campers might prefer the Dagger’s symmetrical design, although we’ve never had a problem with space in the Copper Spur despite its lower peak height (40 in.) and much smaller vestibules (9 sq. ft. each). The Copper Spur will also save you almost a full pound of base weight. However, the Dagger might be the better tent if you want the bump in extra space for a dog or a small child. For more, read our Big Agnes Copper Spur UL2 review.
Nemo Hornet Osmo 2P ($480): Ultralight but Less Livable
The Hornet Osmo is a true ultralight shelter at just 2 pounds 8 ounces, making it a pound and a half lighter than the Dagger Osmo 2P. Both use the same high-quality Osmo fabric, but the similarities mostly end there. The Hornet is semi-freestanding, noticeably tighter inside (27.5 sq. ft. vs. 30.6 sq. ft.), and tapers aggressively at the foot, which limits room for two adults. It also flattens more easily in the wind. If shaving ounces is your top priority and you camp in mild conditions, the Hornet is a smart pick. Otherwise, the Dagger offers far better livability and performance. For a deeper dive, see our Nemo Hornet Osmo 2 review.
The Nemo Dagger is made for hikers who want to max out backcountry comfort. The tent doesn’t levy too harsh of a weight tax, considering the room it provides, and it’s a well-constructed model. Its high price tag would fit better on a lighter design, though.
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
Our favorite do-it-all backpacking tent, the Copper Spur offers exceptional livability and weatherproofing for a minimal weight and packed size. Yes, its price is hard to swallow, but this tent won’t let you down.
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
This tent is packable enough to place it firmly in the ultralight category, yet it retains plenty of quality-of-life features that we appreciate (including two doors and vestibules). The Hornet Osmo is a mixed bag for weather protection, though, and is one of the smallest 2-person tents we tested.
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
Is the Dagger Osmo 2P for You?
If you want a roomy, fully featured backpacking tent that doesn’t require babying and can handle real weather, the Nemo Dagger Osmo 2P should be on your shortlist. It’s heavier than many ultralight models, but you get standout interior space, excellent protection in wind and rain, and thoughtful extras like massive vestibules and Nemo’s Landing Zone gear tubs. If you’re an ounce-counter or primarily camp in fair weather, there are lighter and cheaper options. But for backpackers who value livability and storm-worthiness in a still-manageable weight, the Dagger strikes a very compelling balance.
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