With its unmistakable hourglass shape, the Nemo Disco ($280) stands out in the otherwise uniform sleeping bag landscape. Ample room for side-sleepers, restless legs, or larger campers is the name of the game, in addition to a laserlike focus on comfort. One of the best draft collars in the business, two vents, and soft materials make the Disco one cozy bag, and its construction is top-notch. However, its warmth-to-weight ratio is mediocre and it’s likely too heavy if you’re a backpacker who prefers to go light. For moderate trail miles or car-camping, though, the Disco is a winner.
Warmth / Weight
Comfort
Features
Durability
Water Resistance
Sustainability
Temp Rating
31/21˚F (ISO Comfort/Limit)
Weight
2 lb. 7 oz.
Fill
1 lb. of 650-fill down
Shell
20D polyester
Shoulder/Hip Girth
64/58 in.
Packed Volume
8.7L
Other Temps
15F
Pros
Cons
Nemo Disco 30
For this season's top models, see our guide to the Best Backpacking Sleeping Bags.
While many aspects of the Nemo Disco’s design have a premium feel, its insulation isn’t one of them. The women’s regular I tested is stuffed with 1 pound of 650-fill down, a fill power that helps keep the price reasonable but makes it heavy and bulky for its 31-degree comfort rating (the men’s regular has a 40-degree comfort rating and features 11 oz. of down). This is not the sleeping bag to take into the woods if a minimal load and limited pack space are on your bingo card. At 2 pounds 7 ounces (2 lb. 2 oz. for the men’s), the Disco lags behind lighter, more compressible bags such as the Feathered Friends Swallow UL 30 (1 lb. 7.4 oz.) and the REI Co-op Magma 30 (1 lb. 6.8 oz.), both of which feature a higher-fill down that offers better warmth for its weight.
In terms of actual warmth, the Nemo Disco 30 performed as expected. I tested the bag on a trip into Washington’s Enchantments, during which I camped in the alpine. At night the temperature dropped to the mid-20s, and I would start out wearing my down jacket until my body acclimated to the bag and my body temp rose (I also wore a base layer top and bottom and two pairs of socks). I’m a fairly warm sleeper, and found myself unzipping and rezipping the torso vents throughout the night. As a nice touch, they feature zipper pulls inside the bag so you don't have to take your arms out to access them. Overall, the Disco’s temp ratings seemed accurate, which is always a plus whether you’re using the bag for car-camping or decide to hoof its bulky build into the backcountry.
Comfort is where the Disco distinguishes itself. Its dimensions are extremely roomy thanks to the bag’s hourglass shape, which splits the difference between thermally efficient mummy bags and more spacious semi-rectangular models. The Disco extends outwards at the shoulders (60 in. for my women’s regular), in at the hips (56 in.), and, in a unique Nemo design trope, out again at the knees (59 in.) to provide plenty of space for your torso as well as room to sleep on your side, curl up your legs, or get into whatever position you prefer. For comparison, the Therm-a-Rest Parsec 20, which is considered a spacious mummy bag, measures 62 inches, 57 inches at the hips, and 46 inches at the feet.
A host of other design elements combine to add to the Disco’s comfort bona fides. One highlight is the generous draft collar (Nemo calls it a “blanket fold”), which was easily my favorite feature. I’ll discuss it more in the “Features” section below, but suffice to say the collar shut out cold drafts. The Disco’s polyester fabric also feels silky-smooth, granting an airy, cozy feel. The material was very quiet, and noise was never an issue over my nights spent sleeping in the Disco. I also routinely use a Feathered Friends down quilt, and the Disco felt more luxurious thanks to its dimensions and design.
Along with its shape, smartly designed features are what make the Nemo Disco 30 stand out. As I mentioned earlier, the oversized draft collar—which you can situate outside of the head opening or next to your neck and torso—does an excellent job of blocking errant chills from entering the bag. It also provided a little extra floof around my face, further underscoring the bag’s coziness. Just as noticeable are the two long vents, one on each side of the torso, that I used to regulate temperature. They have a thin scrim of fabric on the inside and don’t open to the inside of the bag, but you can zip them open and closed to dump heat, as I did in the Enchantments.
The Disco also has a small zippered pocket that can fit a watch, chapstick, and earplugs, and a pillow pocket inside the hood. I had difficulty fitting my pillow into the pocket, so I didn't use that feature. The bag’s hood and footbox are reinforced with an extra layer of fabric that guards against moisture, which is a great touch considering that those are the areas of the bag that most frequently come into contact with the condensation-covered walls of a backpacking tent. All in all, it’s hard to find the Disco’s feature set lacking in any way. If you’re up for trading weight for user-friendliness, you’ll enjoy sleeping in this bag.
I enjoyed the soft feel of the Disco’s polyester fabric, but the thin material is more delicate than other backapcking sleeping bags I've tested. Because it was so cold in the Enchantments, I spent a lot of time sitting in the bag on the granite rocks around our campsites, and the material suffered some abrasions that needed to be patched to keep the down from flying out. In fact, one of the seams on my bag separated along a 2-inch-long section, which led to some insulation loss. Luckily we had a patch, and my guess is that issue was a quality-control concern rather than a pervasive problem with Nemo sleeping bags.
Nemo claims that the Disco has an “anti-snag zipper,” but the bag’s thin fabric often got stuck in the main zipper. It was relatively easy to free it each time, but I do worry that the zipper might rip the fabric at some point. The vent zippers are quite a bit smaller and while they functioned well on my trip, they’re also quite delicate. If you tend to treat their gear roughly or plan to use your bag outside of a tent, I’d recommend a more durable bag. As with most quality gear, taking care of the Disco will greatly prolong its usable life.
There's few things worse than a wet sleeping bag, and the Nemo Disco 30 takes a proactive approach against moisture with water-resistant hydrophobic down insulation and targeted reinforcements. Its hood and footbox—two areas most likely to come into contact with condensation—are constructed with a more durable, PFAS-free waterproof material to help prevent moisture from seeping into the fabric. These reinforcements provide valuable protection against tent condensation and light dampness, though they are not a substitute for proper moisture management. For wet conditions, using a waterproof stuff sack and keeping the bag securely inside a tent remains the best strategy.
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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.
Responsible Down
The Responsible Down Standard (RDS), developed by Textile Exchange, is the leading certification for responsibly sourced down and uses third-party audits throughout the supply chain to verify animal welfare, responsible farming practices, and safe working conditions. Recycled down is another responsible choice that helps reduce demand for newly sourced down while keeping existing materials in circulation. A green check mark indicates a product uses responsibly sourced or recycled down, a yellow check mark indicates the brand sources responsible or recycled down for the majority of its products but does not specify it at the product level, and a red X indicates the product does not use responsibly sourced or recycled down.
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.
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.
Nemo sells the Disco in both men’s and women’s versions, which each come in long and regular sizes. A men’s long fits sleepers up to 6-foot-6 and the regular up to 6 feet; the women’s long goes up to 6 feet and the regular up to 5-foot-6. The women’s Disco is heavier than the men’s due to a higher fill weight. This causes the women’s regular to weigh 2 pounds 7 ounces (the men’s is 2 lb. 2 oz.) and gives it a lower comfort rating of 31 degrees (the men’s is 40˚).
I’m 5-foot-6 and 130 pounds, and I usually sleep in a regular-size bag. Knowing that the Disco is a roomy bag, I opted for the women’s regular. Despite being on the high end of the size-regular’s range, I was able to sleep on my side with my knees bent and felt comfortable with the amount of room I had in the bag. The space was a nice aspect, as a typical mummy bag does not offer the same comfort.
Big Agnes Sidewinder 20 ($330): Another Take on Side-Sleeping
Like the Disco, the Sidewinder 20 is purpose-built for side sleepers, with a centered zipper that prevents rolling onto it during the night. While its shoulder girth is similar to the Disco’s, it tapers aggressively at the feet, offering far less room overall (whereas the Sidewinder is meant to turn with you, the Disco is roomy enough that you can turn inside of it). Both bags use 650-fill down, but the Disco uses slightly more of it, while the Sidewinder supplements with synthetic fill at the hips and footbox. Where the Disco really pulls ahead is features: The draft collar, vents, pillow pocket, and reinforced hood and footbox all help justify its higher price and weight. In the end, the Sidewinder feels more niche; the Disco feels more versatile. To learn more, see our Sidewinder SL review.
Therm-a-Rest Boost 650 32 ($300): Even More Venting!
The Boost takes the Disco’s venting concept even further, incorporating two pass-through zippers near the shoulders that allow you to stick your arms out. This provides even better airflow and the added benefit of performing in-tent tasks—like reading, cooking in the vestibule on a cold morning, or reaching for your headlamp—without fully leaving the warmth of your bag. The Boost is wider than the Disco at the shoulders and hips, but side sleepers may notice that it’s not as roomy in the knee area. However, this semi-rectangular bag has a unique trick up its sleeve: thanks to a topside central zipper, it can convert into a slimmer mummy shape, allowing you to trap more heat when needed. The Boost is also a bit lighter (1 lb. 12 oz. for the short version), which makes it a more suitable choice for temperate backpacking. For more, read our in-depth review of the Therm-a-Rest Boost 650 20.
With an hourglass shape that provides plenty of room at the shoulders and knees, the Disco’s dimensions are a boon for side-sleepers. We also like its thoughtful design choices and soft materials, although its durability and weight aren’t top notch.
Warmth / Weight
Comfort
Features
Durability
Water Resistance
Sustainability
The purpose-built Sidewinder is made for one specific group of backpackers: those who sleep almost exclusively on their sides. However, it’s not for everyone, and is middling in weight and packability.
Warmth / Weight
Comfort
Features
Durability
Water Resistance
Sustainability
The versatile, uniquely designed Boost is geared toward comfort-minded backpackers who want a bag they can also use for car camping, travel, or the occasional house guest. It’s heavy for hiking far, though, and a bit expensive for its weight and bulk.
Warmth / Weight
Comfort
Features
Durability
Water Resistance
Sustainability
If you often feel restricted in a traditional sleeping bag, the Nemo Disco 30 might be the solution you’ve been searching for. Its roomy design allows you to twist, turn, and shift comfortably while still offering a robust set of features to fine-tune your sleep setup. Given its weight and bulk, it’s not the best choice for deep backcountry adventures, but if you’re not counting ounces, it’s hard to find a more comfortable backpacking sleeping bag. For most campers, the Disco shines as a spacious and cozy car-camping option or a reliable travel companion—all at a price that remains competitive in the market.
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