It’s amazing to think that a sleeping bag can weigh only 1 pound and keep you warm through the night. To pull this off, manufacturers utilize light and lofty down insulation, thin shell and lining fabrics, and a pared-down, narrow shape. For 2019, there is an extensive array of backpacking sleeping bags available, and we've organized them by weight in charts: unisex mummy sleeping bags, women's-specific bags, and hoodless sleeping bags and quilts for the UL crowd. To keep each list a manageable length, we trimmed a handful of redundant or obscure bags and set the following parameters: 2.5-pound max weight and 35-degree max temperature rating. For our top picks, see our review of the best backpacking sleeping bags.

Unisex Mummy Sleeping Bags

Sleeping Bag Weight Price Temp Fill Shldr / Hip Stuff
Western Mountaineering HighLite 35 1 lb. $370 35°F 850-fill down 59 in. / 51 in. 6 x 10 in.
Sea to Summit Spark SpII 28 1 lb. 1.3 oz. $349 28°F 850-fill down 59 in. / 51 in. Unavail.
Marmot Phase 30 1 lb. 1.6 oz. $399 30°F 850-fill down 60 in. / 58 in. 6 x 12 in.
Rab Neutrino 200 1 lb. 2.3 oz. $350 30°F 800-fill down Unavail. Unavail.
Western Mountaineering SummerLite 1 lb. 3 oz. $425 32°F 850-fill down 59 in. / 51 in. 6 x 12 in.
REI Co-op Magma 30 1 lb. 3.8 oz. $319 30°F 850-fill down 63 in. / 57 in. 4.8 x 13 in.
Therm-a-Rest Hyperion 20 1 lb. 4 oz. $420 20°F 900-fill down 57 / 49.5 in. 6 x 8 in.
Feathered Friends Merlin UL 30 1 lb. 5.3 oz. $429 30°F 950-fill down 58 in. / 52 in. Unavail.
Big Agnes Flume UL 30 1 lb. 6 oz. $470 30°F 850-fill down 60 in. / 54 in. 7.5 x 15 in.
Rab Mythic 400 1 lb. 7 oz. $500 21°F 900-fill down Unavail. 7 x 17 in.
Marmot Phase 20 1 lb. 7.3 oz. $459 20°F 850-fill down 60 in. / 58 in. 7.5 x 16 in.
Marmot Hydrogen 1 lb. 7.3 oz. $329 24.4°F 800-fill down 61 in. / 56 in. 6 x 12 in.
Feathered Friends Hummingbird UL 1 lb. 8 oz. $509 20°F 950-fill down 58 in. / 52 in. Unavail.
Feathered Friends Osprey UL 30 1 lb. 9 oz. $449 30°F 950-fill down 60 in. / 56 in. Unavail.
REI Co-op Igneo 25 1 lb. 10 oz. $269 25°F 700-fill down 60 in. / 55 in. 8 x 15 in.
Nemo Kayu 30 1 lb. 10 oz. $340 31°F 800-fill down 62 in. / 57 in. 7.5 x 14 in.
Sea to Summit Trek TkI 1 lb. 11 oz. $269 32°F 650-fill down 60 in. / 57 in. Unavail.
Big Agnes Hitchens UL 20 1 lb. 11 oz. $530 20°F 850-fill down 60 in. / 54 in. 7.5 x 15 in.
The North Face Gold Kazoo 1 lb. 12 oz. $239 35°F 700-fill down 62 in. / 57 in. 8 x 13 in.
Big Agnes Wiley SL 30 1 lb. 12 oz. $260 30°F 650-fill down 60 in. / 54 in. 7.5 x 15 in.
Feathered Friends Swallow 20 YF 1 lb. 12.7 oz. $449 20°F 900-fill down 60 in. / 56 in. Unavail.
Western Mountaineering UltraLite 20 1 lb. 13 oz. $525 20°F 850-fill down 59 in. / 51 in. 7 x 13 in.
Sea to Summit Ascent Acl 25 1 lb. 14 oz. $329 25°F 750-fill down 61 in. / 57 in. Unavail.
Kelty Sine 35 1 lb. 14 oz. $240 29°F 800-fill down 60 in. / 56 in. 7 x 14 in.
Western Mountaineering AlpinLite 20 1 lb. 15 oz. $585 20°F 850-fill down 64 in. / 55 in. 8 x 15 in.
The North Face Furnace 35 2 lbs.  $169 27°F 600-fill down 63 in. / 59 in. 8 x 14 in.
Therm-a-Rest Parsec 20 2 lbs. $400 20°F 800-fill down 62 in. / 57 in. 10 x 15 in.
Nemo Kyan 20 2 lbs. 1 oz. $220 20°F Synthetic 62 in. / 55 in. 14 x 7.5 in.
Exped Comfort 32 2 lbs. 2.2 oz. $309 32°F 700-fill down Unavail. 9.1 x 5.5 in.
Mountain Hardwear Lamina 2 lbs. 2.7 oz. $170 30°F Synthetic 60 in. / 58 in. 7 x 13.5 in.
The North Face Cat's Meow 22 2 lbs. 4 oz. $169 22°F Synthetic Unavail. 9 x 16 in.
Big Agnes Skeeter SL 20 2 lbs. 4 oz. $290 20°F 650-fill down 60 in. / 54 in. 8 x 17.5 in.
Kelty Cosmic Down 20 2 lbs. 6.6 oz. $170 19°F 600-fill down 62 in. / 58 in. 8 x 15.5 in.
Big Agnes Buell 30 2 lbs. 7 oz. $110 30°F Synthetic 60 in. / 54 in. 8 x 17.5 in.
Exped Comfort 32 2 lbs. 8 oz. $359 32°F 700-fill down Unavail. 9.1 x 6.3 in.
REI Co-op Radiant 19 2 lbs. 8 oz. $199 19°F 600-fill down 62 in. / 58 in. 8.3 x 18 in.

Women's Mummy Sleeping Bags

Sleeping Bag Weight Price Temp Fill Shldr / Hip Stuff
REI Co-op Magma 30 1 lb. 6.5 oz. $319 29°F 850-fill down 60 in. / 57 in. 6 x 14 in.
Feathered Friends Grouse UL 30 1 lb. 7 oz. $414 30°F 950-fill down 54 in. / 56 in. Unavail.
Feathered Friends Egret UL 20 1 lb. 9.6 oz. $489 20°F 950-fill down 54 in. / 56 in. Unavail.
REI Co-op Joule 30 1 lb. 12 oz. $269 30°F 700-fill down 58 in. / 56 in. 8 x 18 in.
Nemo Aya 30 1 lb. 12 oz. $340 30°F 800-fill down 58 in. / 54 in. 8.5 x 15.5 in.
Marmot Phase 20 1 lb. 13 oz. $479 20°F 850-fill down 60 in. / 58 in. 8 x 16 in.
Nemo Jam 30 2 lbs. 3 oz. $350 30°F 800-fill down 58 in. / 58 in. 9 x 18 in.
Nemo Cleo 30 2 lbs. 3 oz. $250 30°F 650-fill down 56 in. / 53 in. 7.5 x 11 in.
Big Agnes Sydney SL 25 2 lbs. 3 oz. $300 25°F 650-fill down 55 in. / 56 in. 7.5 x 15 in.
Rab Neutrino Pro 2 lbs. 4.6 oz. $500 23°F 800-fill down Unavail. Unavail.
Marmot Trestles Elite Eco 30 2 lbs. 5 oz. $139 29.7°F Synthetic 58 in. / 58 in. 9.5 x 19 in.
Mountain Hardwear Lamina 2 lbs. 5 oz. $170 30°F Synthetic 58 in. / 52 in. 7.5 x 15.5 in.
Nemo Azura 20 2 lbs. 6 oz. $220 20°F Synthetic 58 in. / 54 in. 7.5 x 15 in.
Kelty Sine 20 2 lbs. 8 oz. $280 20°F 800-fill down Unavail. 8.5 x 14 in.
Big Agnes Blue Lake 25 2 lbs. 8 oz. $120 25°F Synthetic Unavail. 8 x 17.5
Big Agnes Mirror Lake 20 2 lbs. 8 oz. $230 20°F 600-fill down 56 in. / 56 in. 8 x 17.5 in.


Hoodless Sleeping Bags and Quilts

Sleeping Bag or Quilt Weight Price Temp Fill Shldr/Foot Stuff
UGQ Bandit 1 lb. $265 30°F 950-fill down 50 in. / 40 in. Unavail.
Enlightened Equipment Enigma 1 lb. 0.3 oz. $290 30°F 950-fill down 54 in. / 40 in. Unavail.
Nunatak Arc UL 1 lb. 0.4 oz. $360 30°F 900-fill down 48 in. / 36 in. Unavail.
Katabatic Gear Palisade 30°F 1 lb. 1.5 oz. $400 30°F 900-fill down 52 in. / 38 in. 5.5 x 10 in.
Enlightened Equipment Revelation 1 lb. 1.8 oz. $280 30°F 950-fill down 54 in. / 40 in. Unavail.
Feathered Friends Tanager 20 1 lb. 2.6 oz. $369 20°F 950-fill down 62 in. / 38 in. Unavail.
Zpacks Solo Quilt 1 lb. 2.7 oz. $339 20°F 900-fill down 61 in. / 35 in. 6 x 12 in.
Hammock Gear Burrow 20 1 lb. 2.8 oz. $259 20°F 850-fill down 50 in. / unavail. Unavail.
Therm-a-Rest Vesper Down Quilt 1 lb. 3 oz. $380 20°F 900-fill down 58 in. / 37 in. 5.5 x 8 in.
REI Co-op Magma Trail Quilt 30 1 lb. 3 oz. $299 30°F 850-fill down 56 in. / unavail. 13 x 4.8 in.
Zpacks 20F Classic Sleeping Bag 1 lb. 3.2 oz. $379 20°F 900-fill down 61 in. / 61 in. Unavail.
Therm-a-Rest Corus 1 lb. 4 oz. $200 32°F 650-fill down 53 in. / unavail. 7 x 10 in.
Enlightened Equipment Convert 1 lb. 5.2 oz. $350 30°F 950-fill down 58 in. / 38 in. Unavail.
Jacks R Better Hudson River 1 lb. 5.5 oz. $225 20°F 800-fill down 48 in. / unavail. Unavail.
Katabatic Gear Flex 22°F 1 lb. 6.1 oz. $370 22°F 900-fill down 54 in. / 40 in. 7 x 13 in.
Jacks R Better Sierra Sniveller 1 lb. 8 oz. $235 20°F 800-fill down 52 in. / 42 in. Unavail.
Feathered Friends Flicker UL 20 1 lb. 10 oz. $424 20°F 950-fill down 62 in. / 39 in. Unavail.
Nemo Banshee 20 1 lb. 11 oz. $370 20°F 850-fill down 60 in. / 45 in. 6 x 12 in.

Temperature Ratings

As sleeping bag weight goes down, temperature rating goes up. It’s a simple formula: warmer bags have more down fill and require more shell fabric to contain it. For the purposes of this list, we stuck to a 35-degree Fahrenheit temperature rating at the high end. Anything above that is very questionable for backcountry use and strictly for when the conditions are hot.

Don’t expect the warmth of your bag to perfectly match the listed rating. Many gear manufacturers now follow the European Norm (EN) and provide two numbers: the EN Comfort (comfort rating for women) and EN Lower Limit (comfort rating for men), which is what is listed for the unisex bags above. But not all manufacturers use the same standards for testing temperature ratings, and some smaller companies don’t EN-rate their bags at all. This doesn’t mean you should discount non-EN numbers—high-end bags from Western Mountaineering and Feathered Friends often are warmer than a comparable bag’s EN rating.

Backpacking Sleeping Bag EN rating
The EN Comfort, Lower Limit, and Extreme ratings

All in all, we never suggest stretching the limits just to save a few ounces. We all sleep differently—some run warm and others cold—so we build in a buffer of about 10 degrees for the temperature rating of our bags. Overnight lows can dip unexpectedly and you don’t want to be stuck out in the cold. You can add a few degrees with a sleeping bag liner or by wearing a jacket, but opting for a warmer sleeping bag is the route we recommend (for more, see our article: Sleeping Bag Temperature Ratings Explained).

Down and Synthetic Insulation

The down vs. synthetic debate is one of our favorites and something we cover extensively in our insulated jacket and sleeping bag reviews. For backpacking sleeping bags, it’s clear-cut: down insulation is the lightest insulator, which is why all of the lower-weight bags on the lists above are down-filled. Down bags are also more expensive, so if you don’t mind an extra pound or so of weight and a larger stuffed size (synthetics don’t pack down as small), a synthetic bag is a viable option. Synthetics do insulate better when wet—even more than the new hydrophobic down treatments. But when it comes to cutting weight, you want down fill.

In terms of down fill power, the table above spells it out pretty clearly. The top is full of bags with premium down (800-fill and up) because it insulates better at a given weight. Custom sleeping bags like the Enlightened Equipment Convert show the impacts in upgrading: you can choose the Convert 30F with either 800- to 950-fill down, and total weight drops from 22.81 to 21.18 ounces (for a significant price increase).

Making your way down the list, there are number of mid-range options with 600- to 700-fill down and even a couple synthetic bags mixed in. Weight does go up but price also drops substantially. There are a growing number of synthetics (including the 2-pound-1-ounce Nemo Kyan 20) that do an admirable job of keeping weight down at competitive temperature ratings and reduced costs. But when the question is all about weight, premium down still is best.

Sleeping Bag Shape

Sleeping bag shape matters, and a key way that manufacturers cut weight is by tapering things in (cutting corners, so to speak). Some sleeping bags are designed for people who want extra room or sleep on their sides, while others fit tightly and don’t allow for nearly as much movement. Ultralight bags in particular are known for having the most heavily tapered designs, although you often have choices in the cut.

There are real sacrifices in terms of comfort, so it’s important to think through your backpacking style and sleeping preferences. Are you a casual weekender or fast-packing minimalist who saws off the end of your toothbrush? Are you a back sleeper or a side sleeper? You can start by eyeing the shape of a bag, then check the shoulder and hip girth (listed in our table above when available). Mummy bags are some of the least spacious designs, tapering pretty heavily from the shoulders to footbox. On the other end of the spectrum, Nemo innovated with the spoon-shaped Riff, which is 64 inches in the shoulders and 60 inches in the hips, a significant 4 to 8 inches roomier than comparable bags. True, the added material ups the weight to over 2 pounds, but the extra ounces are worth it for some.

Western Mountaineering UltraLite (drying out)
Mummy bags taper heavily from the shoulders to the feet

Stuffed Size

A sleeping bag takes up a significant amount of space in your pack—along with your tent and sleeping pad (yes, we've created handy charts on backpacking tent weight, one-person tent and shelter weight, and sleeping pad weight too), it’s among your largest pieces of gear. As you might expect, premium down packs the smallest, and warmer bags with more down generally have larger stuffed sizes. A big downside of synthetic insulation is that it doesn’t compress nearly as well as down.

Listed stuffed size can be a little confusing, but all it refers to is the dimensions of the included stuff sack. As a result, a smaller stuffed sack does not necessarily mean one bag is more compressible than one with larger measurements. We provide the numbers on this list as an indication of how much space the bag will take in your pack, but you can always buy a compression sack separately to reduce its volume.

Top Sleeping Bag Picks (stuff sacks)
Down bags stuff down much smaller than synthetic

Compressed volume will crop up as well in your search—REI is particularly keen to list this spec. What the compressed volume shows is the number of liters a sleeping bag fills under a standardized amount of force. The more compressible the insulation and fabric, the lower the volume. Not every bag has this spec, but it’s nice to know when available.

Hood vs. Hoodless

Just about every mainstream sleeping bag is a complete mummy, which means the insulation covers the top and back of the head when cinched up. But there are some niche and cottage-industry designs that go without a hood to cut weight. The appeal typically is limited to ultralight backpackers or those that don’t like the feeling of a mummy bag. The hoodless designs require less fabric and fill, which helps drop their weight (the 20-degree Zpacks Classic Sleeping Bag is a great example).

Lopping the top off the bag does not mean the aforementioned Zpacks bag will keep you warm at 20 degrees without some help. If your head is cold, you’ll be cold, no matter how much insulation is around your legs and chest. A jacket with a hood or beanie works as a replacement (Zpacks also makes a Goose Down Hood that’s pretty awesome). But you should take into account the added weight and cost of the beanie.


There’s no lighter way to stay warm in the backcountry than with a down quilt. Trimming away the bottom material and insulation delivers 30-degree ratings for well under 1 pound. Fit and comfort are also strong suits because the open design emulates your blanket at home and is less constricting than a comparable mummy bag. The open sides can result in some heat loss if you’re not familiar with the system (and sometimes even if you are), so quilts remain a tiny percentage of the market. But for ultralight backpackers, hammock sleepers, or those wanting more wiggle room, a quilt is undeniably the lightweight champ.

Fabric Thickness (Denier)

With ultralight tents, manufacturers cut weight by using thin fabrics that weigh less but are considerably less durable. You’ll see some of the same with sleeping bags, but because they are used on the inside on the tent, thin materials (with a lower denier) are less of a liability. Even the see-through 10-denier shell on the Sea to Summit Spark isn’t cause for too much concern as long as you keep it in a stuff sack and don’t sleep directly on the ground (and maybe keep the dog away from it as well). The biggest threat to tearing a sleeping bag is snagging it on its own zipper, but taking some extra care should allow just about any sleeping bag to have a long life.
Back to Unisex Mummy Sleeping Bags  Back to Hoodless Sleeping Bags and Quilts

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