The Best Hammock Underquilts for Backpacking
On a backpacking trip the underquilt is the heaviest piece of your hammock system. Which one you carry is a weight decision before it is a warmth decision.
By Mike M. · Last updated
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The Hammock Gear Incubator is the pick for backpacking: 850-fill down in five ratings and three lengths, packing to roughly 4.5 liters at 40F. If you want a quilt on the shelf rather than made to order, the Outdoor Vitals Aerie publishes 1.7 lb at 30F and converts to a sleeping bag.
Part of our hammock gear hub. Our general underquilt roundup covers the whole category. This page only asks one question: what does each quilt cost you in pack weight and pack volume for the warmth it gives back.
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 |  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 | |
| 2 | 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 | |
| 3 | 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 | |
| 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 | ENO Vulcan UnderQuiltThe Ember's warmer sibling — PrimaLoft down to 30 F, the same published DoubleNest compatibility, one ounce heavier. | Colder nights, same fit | 30 to 50 degrees F (-1 to 10 C) | |
| 6 | ENO Ember UnderQuiltENO's own synthetic quilt, and the only one whose fit with a DoubleNest is a published compatibility statement rather than an assumption. | Best underquilt for a DoubleNest | 40 to 60 degrees F (4 to 15 C) |
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Weight and packed size, side by side
| Quilt | Fill | Ratings | Published weight | Packed size |
|---|---|---|---|---|
| Hammock Gear Incubator | 850 down | 40F to 0F | Not published per rating | About 4.5 L at 40F, 8.5 L at 20F |
| Outdoor Vitals Aerie | 800+ down | 45F to 0F | 1.7 lb at 30F; 2.1 lb at 20F | Not published |
| Warbonnet Wooki | 850 Expi-Dry down | 40F to -20F | Not published per rating | Not published |
| OneTigris Night Protector | Synthetic | 40F to 68F, or 23F to 41F | 24.7 oz / 700 g | Compression sack included |
| ENO Vulcan | PrimaLoft | 30F to 50F | 28 oz / 801 g | 9.6 L |
| ENO Ember | Recycled polyester | 40F to 60F | 27 oz / 754 g | 12 x 7 x 7 in |
The honest summary of that table is that the cottage brands win on weight and lose on transparency, and the mainstream brands do the reverse. ENO publishes an exact ounce figure and a packed volume for both its quilts; Hammock Gear and Warbonnet publish fill power, shell denier and construction but not a weight per configuration. Both approaches are defensible and only one of them lets you fill in a gear spreadsheet.
1. 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.
2. 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.
3. 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.
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. Colder nights, same fit
ENO Vulcan UnderQuilt
The Ember's warmer sibling — PrimaLoft down to 30 F, the same published DoubleNest compatibility, one ounce heavier.
Specifications
- 30 to 50 degrees F (-1 to 10 C)
- PrimaLoft Gold (100 g) plus PrimaLoft Black (80 g), dual-layer offset quilting
- 28 oz / 801 g
- 6 ft 6 in x 4 ft 5 in; 9.6 L packed
- Comfortably fits users up to 6 ft 2 in
- Compatible with all ENO hammocks except the DayLoft and SuperNest
Source: eaglesnestoutfittersinc.com Vulcan 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
- Twenty degrees warmer at the bottom of its range than the Ember, for one extra ounce
- PrimaLoft holds loft when damp
- Publishes a user height limit, which underquilts rarely do
Where it falls short
- Costs substantially more than the Ember
- The 6 ft 2 in user limit rules out the tallest hangers
Illustrative photograph of the category, not this exact product.
6. Best underquilt for a DoubleNest
ENO Ember UnderQuilt
ENO's own synthetic quilt, and the only one whose fit with a DoubleNest is a published compatibility statement rather than an assumption.
Specifications
- 40 to 60 degrees F (4 to 15 C)
- 100% recycled polyester insulation (160 g) in dual-layer offset quilting
- 27 oz / 754 g
- 6 ft 10 in x 4 ft laid out; packs to 12 x 7 x 7 in
- ENO states compatibility with all ENO hammocks except the DayLoft and SuperNest
Source: eaglesnestoutfittersinc.com Ember 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
- Published compatibility with the DoubleNest, not inferred from dimensions
- Synthetic keeps working damp, which matters under a hammock
- Recycled insulation at a mainstream price
Where it falls short
- 40 to 60 F is a summer and shoulder-season range, not a cold-weather one
- 27 oz and around 9 liters packed is bulky against a down quilt
Illustrative photograph of the category, not this exact product.
Down or synthetic on a multi-day trip
Down wins on weight and packed size and it is not close. An 850-fill quilt at 20F packs to about 8.5 liters; the synthetic quilts here are bulkier at warmer ratings. The counter-argument is specific to hammocks rather than general: the underside of a hammock is exactly where condensation collects overnight, and wet down stops insulating in a way wet synthetic does not.
- Carry down if your trips are dry, your tarp coverage is good, and every ounce is being counted.
- Carry synthetic if you are out for a week in humid conditions, or you are new enough to hammock camping that your tarp pitching is still improving.
- Treated down splits the difference. Warbonnet's Expi-Dry and Outdoor Vitals' hydrophobic treatment both address damp loft, without making down waterproof.
Length is a weight decision
A full-length quilt insulates from shoulder to calf. A three-quarter quilt saves several ounces and leaves your lower legs on the hammock fabric, which is survivable in summer and miserable in the cold. Hammock Gear's three length bands — 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 — exist precisely so you are not carrying quilt past your feet. Ordering a Long when you are 5 ft 8 in is paying for insulation and then carrying it empty.
Fit matters more in the backcountry
A gap at the head end of an underquilt is a draft straight up your back, and at 2am in the backcountry there is no second quilt to fetch. Rig the quilt at home in daylight. Tension the shock cord so the quilt sits against the hammock with no daylight showing at either end, and check it again after you get in — your weight changes the shape of the hammock and therefore the fit of the quilt.
What we would carry
- Lightest for the warmth: Hammock Gear Incubator, ordered in your length.
- Best all-round buy: Outdoor Vitals Aerie — down warmth, published weights, and it works on the ground as a bag.
- Coldest conditions: Warbonnet Wooki, which reaches -20F and offers a Scandinavian version beyond that.
- Wet weeks: OneTigris Night Protector at 24.7 oz, or the PrimaLoft ENO Vulcan.
- Summer only: ENO Ember, 40F to 60F and 27 oz.
Common questions
How much should a backpacking underquilt weigh?
The quilts here run from 24.7 oz for the synthetic OneTigris Night Protector to 2.1 lb for a 20F down Outdoor Vitals Aerie. Around a pound and a half for a genuine three-season rating is a reasonable target; below a pound means either a summer rating or a three-quarter length.
Is a down or synthetic underquilt better for backpacking?
Down packs smaller and weighs less for the same rating, which is why most long-distance hammock campers carry it. Synthetic keeps insulating when damp, and the underside of a hammock is where condensation lands. Treated down such as Warbonnet's Expi-Dry sits between the two.
Do you need an underquilt for summer backpacking?
Usually yes, in some form. Air moves under a hammock on all sides, so a hammock feels colder than the same night on the ground. ENO's Ember starts at 60F at the top of its range, which tells you the category treats mid-60s Fahrenheit as the point where you want something.
What length underquilt do I need?
Match the length band to your height rather than to your hammock. Hammock Gear publishes Short for 5 ft 2 in to 5 ft 7 in, Standard for 5 ft 7 in to 6 ft 2 in and Long for 6 ft 2 in to 6 ft 7 in. A quilt longer than you need is weight you carry and never use.
Can you use an underquilt with any hammock?
Most full-length quilts fit most gathered-end hammocks, because they hang from the hammock's own ends on shock cord. Brand-matched quilts fit better: ENO publishes compatibility with its own hammocks, and Warbonnet's Wooki is cut for Warbonnet bodies. See underquilts for the Warbonnet Blackbird for that case.
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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