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How to Choose a Women's Sleeping Bag

How to Choose a Women's Sleeping Bag
The REI Magma 15 will keep you warm on cool nights in the alpine.
Credit: Ian McEleney
By Jessica Haist ⋅ Review Editor
Thursday May 14, 2020
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Your sleeping bag is an essential part of your overnight backpacking system. It's considered one of the "Big Four" items that, as a backpacker, will have the greatest impact on your backpacking experience (along with your backpack, shelter, and sleeping pad). It affects the weight of your pack and how well you sleep — which both affect how efficient and energized you will be. The more you can do upfront to choose the right bag for your needs, the better your experience will be in the long run. In this article, we help you make the best choice for that big purchase and discuss why a women's specific bag may be the best choice for you.

The Basics

There is a lot to know about sleeping bags in general. Think about what you will be using yours for — are you trying to break speed records on the Pacific Crest Trail, or are you just making short overnight trips with friends? The lighter and more high tech your bag is, the more expensive it will be. If you are car camping in warm climates, you don't need to worry about weight as much, but instead, you could purchase the most comfortable bag or the least expensive bag on the market. If you are in the market for the lightest bag you can find, learn about the bags we evaluated in our Best Ultralight Sleeping Bag Review.

Related: Best Ultralight Sleeping Bag of 2022

sleeping bag womens - the cloud's comforter is attached on one side and has a 'shoulder...
The Cloud's comforter is attached on one side and has a 'shoulder pocket' that helps wrap it around you and close the opening to keep cold drafts out.
Credit: Ian McEleney

Consider what fill material you want your bag to have. If you are not going to be wet weather camping, or plan on several multi-day backpacking trips, go with a down bag, it will be lighter for its warmth. If you are on a multi-week journey on the coast in November, choosing synthetic makes sense since it stays warmer when wet than down (while down loses more of its loft when wet). Synthetic bags are also typically less expensive and can be useful budget options. However, now with new hydrophobic down technology, getting your down sleeping bag wet is slightly less of an issue and many manufacturers are using this treated down in their bags.

Other things to think about would be how warm your bag needs to be, if you will be winter camping or on a high altitude expedition you should get a bag that is appropriate for that activity, probably rated to zero degrees Fahrenheit or lower — none of which are in this women's review. We discuss these crucial factors in a separate buying advice article geared toward cold conditions.

Also, consider what shape and style will work best, and what features you want. If you or your children are only camping out in the backyard or going to the campground for the weekend, check out the check out our Best Camping Sleeping Bag Review. However, if you're hopping on the John Muir Trail for three weeks, you'll probably want a lightweight backpacking sleeping bag like one of the down bags in our Women's Review or something from the Best Backpacking Sleeping Bag Review. The features we like are stash pockets, draft collars, and soft liner materials.

Why Do Women Sleep Colder?

First off, let's acknowledge that everyone's bodies are different and many factors affect our internal temperatures, including diet, age, fitness, and how much sleep we typically get. It is, however, common knowledge that women tend to feel colder more often than men, and this is especially true when it comes to sleeping outdoors. It's not because we're wimpier. Believe it or not, it's because we have more evenly distributed body fat. We have a layer of fat on our bodies that men do not — that's why our skin has a softer feel and look overall.

sleeping bag womens - we take each product into the backcountry to explore their strengths...
We take each product into the backcountry to explore their strengths and weaknesses. And we have a good time doing it.
Credit: Jessica Haist

Because of this wonderful fat layer, women are better at moderating body temperatures and conserving heat than men. The problem is, when keeping the core heated, the body pulls warm blood away from the hands and feet. Extremity temperatures significantly vary when compared to internal organs, and this, in turn, dictates how hot or cold we feel. Women tend to get cold extremities more often and therefore, feel colder. Differences in metabolism between genders may also play a role. But you know how the saying goes ladies, cold hands = warm heart. Check out this cool video from the BBC on this topic.

sleeping bag womens - the sea to summit flame - women's is one of the warmest and loftiest...
The Sea to Summit Flame - Women's is one of the warmest and loftiest bags we tested.
Credit: Ian McEleney

Possibly because of the extra insulation, most of the women's bags we tested are not any lighter than the men's versions. They tend to be the same weight as corresponding men's bags. Unfortunately, weight savings are not a benefit of getting a women's bag like it is with women's sleeping pads, but usually you're getting a warmer bag for the same weight.

sleeping bag womens - the mountain hardwear lamina has two thirds of its loft on top for...
The Mountain Hardwear Lamina has two thirds of its loft on top for extra warmth.
Credit: Ian McEleney

There is an unfortunate phenomenon that we call "shrink it and pink it" that happens with some women's gear, meaning the manufacturer has not put any real thought into how to make a product work better for a woman. So who has done their research and created a great women's bag and who has not?

On the other hand, more manufactures are creating very high-end products, but are not including a women's specific bag in their lineup. Instead, the manufacturers who are smart and still want to tap into this market, are creating their high-end bags in "short" lengths, often the same dimensions as a women's specific bag. The Mountain Hardwear Phase 15 - Short is one example of this that we've added to our review.

Female Specific Features

Now that we know a little more about women's physiology, it may seem more obvious what to look for in a women's specific bag. Many manufacturers are starting to get it too, and we've seen significant increases in high-quality bags added to our selection. Women's products are starting to catch up with the unisex market and are coming in hot with lightweight materials, high-quality down, and creative features to give you a better night's sleep.

sleeping bag womens - the s2s flame 15 is super warm. at low elevation in the summer it...
The S2S Flame 15 is super warm. At low elevation in the summer it was too warm some evenings.
Credit: Jessica Haist

When it comes to differences between men's and women's sleeping bags, the warmth of the bag is the primary factor, which you can tailor in three ways. The first is to resize the bag to fit a woman's frame. Typical women's specific bags are made to fit a woman who is about 5'6", while a men's regular is made to fit a 6" to 6'2" man. The average woman in the United States is right around 5'4".

Three Main Features of Female-Specific Sleeping Bags:
  1. Length/fit
  1. More insulation per square inch
  1. Location of extra insulation

Women's bags are also cut differently to fit a female form better - they are a bit wider in the hips (an average of 2 inches) and narrower in the shoulder (an average of 2-6 inches less). A better fit helps your body warm the air inside the bag more efficiently. If your bag is too large, your body won't be able to warm up all that air quickly, leaving you cold– so get a bag that fits you. We like the traditional mummy fit of the Sea to Summit Flame and the well-fitting Rab Neutrino 400 - Women's. If you're on the taller side, Feathered Friends makes a 5'9" sized bag for you. We like their informative page on selecting the right sleeping bag for you - they lay out the different types and temperature ratings well.

sleeping bag womens - the feathered friends egret and the marmot phase are both perfect...
The Feathered Friends Egret and the Marmot Phase are both perfect for the high and beautiful alpine environment!
Credit: Jessica Haist

Secondly, look for a bag that has more insulation. Many women's models have more insulation in them than the same model in the men's version. The Rab Neutrino has the same amount of down in its women's version as the men's, but it is a much smaller volume bag, meaning there is more down in it per square inch — making it warmer. The EN rating system also helps to initially determine if the bag is the right temperature. The first comfort rating temperature is meant to represent the temperature at which a woman would find the bag comfortable. However, we take this rating with a grain of salt. It's helpful when comparing EN rated products, but there are still many smaller companies who do not EN test their products because it is too expensive, and they have determined their ratings by field testing.

sleeping bag womens - the neutrino is roomy and comfortable.
The Neutrino is roomy and comfortable.
Credit: Ian McEleney

Thirdly, as mentioned above, women feel colder because their hands and feet are colder. Some manufacturers have realized this too and decided to be strategic about where they put the extra insulation: the feet. For example, The North Face Cat's Meow - Women's bag has extra insulation in the foot box and hood to keep ladies' icicle feet toasty. The REI Joule 21 and Marmot Angel Fire all have extra insulation in heat loss areas for women. We like the design of the Egret because the front and back baffles are continuous and so you can shake the down to arrange it in specific heat-loss areas.

Selecting the Right Bag For You

There are hundreds, if not thousands, of bags on the market, and all are made for different purposes and sold at different price points. OutdoorGearLab has tested over a hundred of these bags for different activities over the years. The bags in this review are women's specific, typically mummy-style, and predominantly for backpacking or car camping. Keep reading to find out more about the considerations you should think about when checking out the bags we tested.


Are you going to be carrying this bag on your back for many days in a row, or will you be throwing it in your boat or car? The weight of your bag is an important factor when choosing a product, but not so much for activities that you won't be carrying it long distances. The Feathered Friends Egret is the best bag to be carrying for extended backpacking trips, but we may go with the Sierra Designs Backcountry Bed or The North Face Cat's Meow when on shorter trips because they are so comfortable and less expensive.

sleeping bag womens - this bag was almost too warm for us on summer nights in the alpine!
This bag was almost too warm for us on summer nights in the alpine!
Credit: Jessica Haist

Insulation Type

Down or Synthetic? The age-old question. Down insulation is typically lighter, more durable, and more compressible, but will lose its loft, and therefore, a significant amount of its warmth when it gets wet. Synthetic insulation maintains its loft when wet, but is typically heavier, less durable, and bulkier than down insulation, and less expensive.

Most of the down bags in this review have some water-resistant or "hydrophobic down" coating to compete with synthetic bags. Hydrophobic down undergoes a waterproofing treatment that tries to create the perfect solution to all insulation's problems. Manufacturers tend to have their proprietary version of hydrophobic down treatment. The insulation is still down, so it is light and compressible, but supposedly it is more resilient to moisture and helps the down maintain its loft longer. The verdict is still out on this technology, but more and more companies are using it in their products.

In general, the synthetic bags in this review are at a disadvantage when it comes to the rating metrics since they are all inherently bulkier and heavier — we prefer down sleeping bags for backpacking, and if you can afford it, would recommend going with down. They are warmer, lighter, and more durable over time; in short, a worthy investment.

Sleeping Systems

Some manufacturers are moving towards bags with no insulation on the backside of bags in place of sleeves for sleeping pads. The thought behind this is that when a bag is laid on, the loft of the insulation is being compressed and is therefore ineffective. By removing the insulation along the back of the bag, the weight goes down, and your sleeping pad (which will hopefully have a high R-Value) can insulate that side of you. The Cloud and the Backcountry Bed both have this feature. We are not sold on these sleeping systems and think they can sometimes lead to a colder, more uncomfortable sleep (by stretching out your bag and restricting you from wrapping it tightly around yourself), and the pad sleeves add extra weight.

sleeping bag womens - the big agnes hazel's pad sleeve also acts as this bag's storage sack.
The Big Agnes Hazel's pad sleeve also acts as this bag's storage sack.
Credit: Ian McEleney

Caring for your Sleeping Bag

You are making a significant investment in your new bag, and it should be able to last you for several years. Most manufacturers provide some cotton or mesh storage sack with your bag, as it is essential to store it fully lofted when you're not carrying it around. This practice helps with the longevity of your investment. Keeping the down compressed damages it over time and even more so with synthetic fibers. The more you compress synthetic fibers, the more they break down, resulting in less loft each use. This process means that ultimately a down bag is more durable and retains its loft and warmth more over time.

sleeping bag womens - these sleeping bags came in all shapes, sizes and storage sacks.
These sleeping bags came in all shapes, sizes and storage sacks.
Credit: Jessica Haist

The best thing you can do for your down bag is to wash it once in a while. When down gets dirty, it does not fluff up as much and will not keep you as warm. When you wash your bag, be sure to use a front loading washing machine and use a detergent made for cleaning technical down; products like Nikwax Down Wash can be used to rejuvenate your down bag. Don't be afraid to throw your bag in the dryer. Get yourself two or three clean tennis balls and toss them in there with it to break up the clumps of down and tumble until it is totally dry. You will be amazed at how much loftier your bag will be after a good wash. Washing your synthetic model is even simpler and will help it with its loft as well. Doing these few things will help the longevity and ensure you get the best value from your investment.

Store your sleeping bag uncompressed and wash it occasionally to increase its longevity.

Lastly, if the shell or liner of your sleeping bag rips, the faster you can repair it, the less insulation you lose. If you're next to a sewing machine and know how to use it, that's the most permanent fix. However, if you are out in the backcountry, having a strip of Tenacious Tape in your pack can seal up a hole well enough until you get back home.

sleeping bag womens - a good nights sleep starts with a warm and cozy sleeping bag. where...
A good nights sleep starts with a warm and cozy sleeping bag. Where will you sleep tonight?
Credit: Jenna Ammerman


The bottom line is that there is less selection in women's specific bags. If you are looking for a very specialized type of bag, like an ultralight quilt for fastpacking, or have a specific brand you love, you might have to go for a unisex bag — but make sure that it is one that fits you and isn't too big! Many smaller craft companies have a range of sizes that include small enough options for women. Regardless, the principles for buying a sleeping bag for a woman (even if you're buying a unisex one) are the same. Decide what you want it for, what materials you prefer, and how much you want to pay. Then, get one that fits you properly and is warm enough — potentially with extra insulation in strategic locations.

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