The Best Underquilts for the Warbonnet Blackbird
Warbonnet makes a quilt for its own hammocks, which removes the fit question — provided you order the right one of the two sizes.
By Mike M. · Last updated
Knot & Nap is reader-supported. We earn from qualifying purchases as an Amazon Associate, at no extra cost to you. Commissions never decide what gets recommended — here is how we pick.
The Warbonnet Wooki is the pick, because it is cut by the company that cut your hammock: 850-fill Expi-Dry down, ratings from 40F to -20F, and an XL size with a 76 by 44 in insulated section for the 11 ft XLC. For a rated alternative on the shelf, the Outdoor Vitals Aerie.
Part of our hammock gear hub. The Blackbird is an asymmetric gathered-end hammock with an integrated bug net and, on most configurations, a footbox shelf. All three of those affect how a quilt sits, which is why brand-matched insulation is a stronger argument here than it is on a plain nylon hammock.
Quick picks
Tap any row to jump to the full write-up. Prices are not shown anywhere on this site — we link straight to Amazon so you see the live figure.
| # | Product | Best for | Headline spec | Price |
|---|---|---|---|---|
| 1 |  Warbonnet Wooki UnderquiltWarbonnet's own underquilt, built to the shape of Warbonnet's own hammocks, which is the whole argument for it if a Blackbird is what you sleep in. | Best for a Blackbird | Temperature ratings 40F, 20F, 0F and -20F | |
| 2 | Hammock Gear Incubator Underquilt850-fill down in five temperature ratings and three lengths, which is the closest this category gets to a quilt cut for your body and your season. | Best backpacking underquilt | Temperature ratings 40F, 30F, 20F, 10F and 0F | |
| 3 | Outdoor Vitals Aerie Down Underquilt800+ fill down in four temperature ratings that also works as a sleeping bag — the quilt for people who do not only hang. | Down warmth, and it converts | 0, 15, 30 and 45 degrees F options | |
| 4 | OneTigris Night Protector Ultralight Hammock UnderquiltUnder 25 oz for a full-length synthetic quilt, in a three-season and a winter version, for when down is out of budget but weight still matters. | Lightest synthetic here | 24.7 oz / 700 g | |
| 5 | Onewind Hammock UnderquiltOnewind's standard underquilt range, rated 35–50°F and 45–70°F depending on the model you pick. | Three-season warmth | Temperature ratings from 35°F to 50°F (2°C to 10°C) and 45°F to 70°F (7°C to 21°C) depending on model |
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The options, side by side
| Quilt | Fill | Ratings | Published dimensions | Fit to a Blackbird |
|---|---|---|---|---|
| Warbonnet Wooki | 850 Expi-Dry down | 40F, 20F, 0F, -20F | Wooki XL insulated section 76 x 44 in | Made for it |
| Hammock Gear Incubator | 850 down | 40F to 0F | Short, Standard and Long length bands | Order by your height |
| Outdoor Vitals Aerie | 800+ down | 45F, 30F, 15F, 0F | 1.7 lb at 30F; 2.1 lb at 20F | Universal fit |
| OneTigris Night Protector | Synthetic | 40F to 68F, or 23F to 41F | 7.9 x 4 ft, 24.7 oz | Short for an XLC |
| Onewind full-length | Synthetic | 35F to 50F, or 45F to 70F | 82 x 52 in | Covers an 11 ft body |
1. Best for a Blackbird
Warbonnet Wooki Underquilt
Warbonnet's own underquilt, built to the shape of Warbonnet's own hammocks, which is the whole argument for it if a Blackbird is what you sleep in.
Specifications
- Temperature ratings 40F, 20F, 0F and -20F
- 850-fill Expi-Dry Gold PFC and PFAS-free DWR goose down, Responsible Down Standard certified
- Dual differential cut, 15-denier high-thread-count PFC and PFAS-free C0 DWR ripstop nylon shell
- Wooki XL insulated section 76 in x 44 in (193 cm x 112 cm), tapered towards the feet
- A Scandinavian Wooki XL with 50 percent more down than the 0F model is offered for extreme cold
Source: warbonnetoutdoors.com Wooki underquilt product page, 2026. We publish specs we can attribute and leave the rest blank rather than assuming a typical value.
What it does well
- Cut by the company that cut your hammock, which removes the fit question entirely
- The -20F and Scandinavian options go colder than anything else we track
- A dual differential cut keeps the down lofted rather than pressed thin at the edges
Where it falls short
- Made to order, with cottage-brand lead times
- Per-rating weights are not published on the product page
- You have to match Wooki or Wooki XL to your hammock length before ordering
Illustrative photograph of the category, not this exact product.
2. Best backpacking underquilt
Hammock Gear Incubator Underquilt
850-fill down in five temperature ratings and three lengths, which is the closest this category gets to a quilt cut for your body and your season.
Specifications
- Temperature ratings 40F, 30F, 20F, 10F and 0F
- 850 fill-power ethically sourced down
- 7-denier, 10-denier and 20-denier ripstop shell options with a DWR coating
- Lengths: Short for 5 ft 2 in to 5 ft 7 in, Standard for 5 ft 7 in to 6 ft 2 in, Long for 6 ft 2 in to 6 ft 7 in
- Hammock Gear states a 40F model stuffs to roughly 4.5 liters and a 20F model to about 8.5 liters
Source: hammockgear.com Incubator product page, 2026. We publish specs we can attribute and leave the rest blank rather than assuming a typical value.
What it does well
- Rating, length and shell denier are chosen at order time rather than fixed
- 850 fill is the highest fill power we track, so it is the smallest packed size per degree
- Three lengths means no dead insulation hanging past your calves
Where it falls short
- Made to order from a cottage brand, so it ships in weeks rather than days
- Per-rating weights are not published on the product page
- Down under a hammock sits exactly where condensation collects
Illustrative photograph of the category, not this exact product.
3. Down warmth, and it converts
Outdoor Vitals Aerie Down Underquilt
800+ fill down in four temperature ratings that also works as a sleeping bag — the quilt for people who do not only hang.
Specifications
- 0, 15, 30 and 45 degrees F options
- 800+ fill power down
- 30 F model 1.7 lb; 20 F model 2.1 lb
- 20D ripstop shell with a VitalDry DWR finish
- Converts to a sleeping bag; two can be joined into a double
Source: Outdoor Vitals Aerie listings and published spec figures, 2026. We publish specs we can attribute and leave the rest blank rather than assuming a typical value.
What it does well
- The only quilt here with a genuine cold-weather rating
- Doubles as a sleeping bag, so it earns its place on ground trips too
- Down packs far smaller than the synthetic ENO quilts
Where it falls short
- Down loses loft wet, and the underside of a hammock is where condensation lands
- Fit with a specific hammock is not published the way ENO's is
Illustrative photograph of the category, not this exact product.
4. Lightest synthetic here
OneTigris Night Protector Ultralight Hammock Underquilt
Under 25 oz for a full-length synthetic quilt, in a three-season and a winter version, for when down is out of budget but weight still matters.
Specifications
- 24.7 oz / 700 g
- Full length 7.9 ft x 4 ft (240 cm x 120 cm)
- Three-season version rated 40F to 68F (5C to 20C)
- Winter version rated 23F to 41F (-5C to 5C)
- Compression stuff sack included
Source: OneTigris Night Protector Amazon listing, 2026. We publish specs we can attribute and leave the rest blank rather than assuming a typical value.
What it does well
- 24.7 oz is lighter than both ENO synthetic quilts
- Synthetic fill keeps working damp, which is the failure mode down has under a hammock
- Two versions cover summer and winter without a custom order
Where it falls short
- Synthetic packs bulkier than 850-fill down at the same warmth
- Seller-published temperature bands with no standardized test behind them
Illustrative photograph of the category, not this exact product.
5. Three-season warmth
Onewind Hammock Underquilt
Onewind's standard underquilt range, rated 35–50°F and 45–70°F depending on the model you pick.
Specifications
- Temperature ratings from 35°F to 50°F (2°C to 10°C) and 45°F to 70°F (7°C to 21°C) depending on model
Source: onewindoutdoors.com, 2026. We publish specs we can attribute and leave the rest blank rather than assuming a typical value.
What it does well
- Two rating bands means you can match the quilt to your actual season
- Underquilts beat sleeping pads for hammock insulation
Where it falls short
- You have to read carefully to buy the right band
- Fill weight is not published per model
Illustrative photograph of the category, not this exact product.
Wooki or Wooki XL
This is the decision the page exists for. Warbonnet sells the Wooki in a standard and an XL size, and the XL's insulated section measures 76 by 44 inches, tapering towards the feet. The original Blackbird is a 10 ft body; the Blackbird XLC is 11 ft with a 111 in ridgeline and a published fit for users up to 7 ft. The longer hammock wants the longer quilt — an XL on a standard Blackbird is extra material you carry and do not need, and a standard quilt on an XLC leaves the ends of the hammock uncovered, which is exactly where cold air gets in.
Warbonnet also offers a Custom Wooki made to order, and a Scandinavian Wooki XL with 50 percent more down than the 0F model for genuinely extreme cold. Both are made to order with cottage-brand lead times, so they are a plan-ahead purchase rather than a week-before-the-trip one.
When a third-party quilt makes more sense
- You need it this month. The Wooki ships in weeks. The Outdoor Vitals Aerie and the ENO quilts are shelf stock.
- You own several hammocks. A universal-fit quilt moves between them; a Wooki is sized to a Warbonnet.
- You want a published weight. Warbonnet publishes construction and dimensions but not a weight per rating; Outdoor Vitals publishes both.
- You also camp on the ground. The Aerie converts to a sleeping bag, which no dedicated underquilt does.
- Budget. The OneTigris and Onewind quilts cost a fraction of a cottage-brand down quilt, at a cost in weight and packed size.
Getting the fit right on an asymmetric hammock
A Blackbird is designed around a diagonal lay, so your shoulder and hip sit off the hammock's center line. Hang the quilt to follow your body rather than the seam, then get in and check for daylight at the head end — that is the one gap that will wake you. Tension the head-end shock cord last, with your weight in the hammock, not before. The same discipline covered in hammock camping in rain and cold.
What we would buy
- Blackbird XLC owners: Wooki XL, in the rating that matches your coldest realistic night.
- Original Blackbird owners: standard Wooki, same logic.
- Needed sooner than a cottage-brand lead time: Outdoor Vitals Aerie.
- Custom length rather than Warbonnet sizing: Hammock Gear Incubator, ordered by your height band.
- Wet weeks or a tight budget: OneTigris Night Protector at 24.7 oz.
Common questions
What underquilt fits a Warbonnet Blackbird?
Warbonnet's own Wooki is cut for it, in a standard size for the 10 ft Blackbird and an XL with a 76 by 44 in insulated section for the 11 ft Blackbird XLC. Full-length universal quilts also fit, provided the quilt is long enough for the hammock body.
Do I need the Wooki or the Wooki XL?
Match the quilt size to the hammock length. The XL is the one for an 11 ft body such as the Blackbird XLC; the standard Wooki suits the original 10 ft Blackbird. A quilt that is too short leaves the ends of the hammock uncovered, which is where drafts start.
How cold can a Wooki go?
Warbonnet publishes 40F, 20F, 0F and -20F ratings, and offers a Scandinavian Wooki XL with 50 percent more down than the 0F model for extreme cold. It uses 850-fill Expi-Dry Gold goose down certified to the Responsible Down Standard.
Can you use a Hammock Gear Incubator on a Blackbird?
Yes. The Incubator is ordered by your height rather than by hammock model — Short, Standard or Long — and it hangs from the hammock's own ends on shock cord like any full-length quilt. It publishes ratings from 40F to 0F in 850-fill down.
Is a brand-matched underquilt worth it?
On an asymmetric hammock, often yes. It removes the sizing question and the cut follows the hammock's shape. The costs are lead time and flexibility: a Wooki is made to order and it is sized to a Warbonnet, so it is a poor choice if you swap hammocks often.
Sources
Every specification on this page traces to one of these. Where a recommendation rests on another publication's hands-on testing, we name it — we do not run a test lab.
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