Are Sleeping Bags Comfortable?

"Are sleeping bags comfortable?" It's a fair question, and one that gets asked most often by the picky sleeper in any camping group, the person who wants to be sure of a decent night before committing to a weekend outdoors. Answering it means talking about the different types of sleeping bags, how each one feels, and even a few alternatives.

The trick to sleeping comfortably in your bag isn't just to pick something off the shelf. That can work, but there are different materials, shapes and temperature ratings to be aware of. This article covers how to pick a comfortable sleeping bag and how to sleep more comfortably in it once you have one.

So are sleeping bags comfortable? Most people are comfortable with sleeping bags. However, some may find them restricting, too warm, or too cold. The material used in the sleeping bag is also a factor when it comes to comfort. If sleeping bags aren't comfortable, blankets can be a great alternative.

Are sleeping bags comfortable compared with a bed?

Will a sleeping bag be as comfortable as your bed at home with a blanket? Probably not. A bed lets you roll, sprawl and kick a leg out from under the covers, and a bag limits all of that to some degree. If you're looking at something long term, you could probably get used to a sleeping bag every night, but it wouldn't be my first choice.

Even for a few nights, when I could easily deal with a bag, I still prefer blankets. I find sleeping bags too restricting and temperature control is harder. You end up zipping and unzipping all night, and you can't simply stick your feet out.

That last point is the real comfort issue for many people. A bag holds warmth in one sealed pocket, so it's all or nothing unless you open a zipper. A blanket can be pulled up, kicked off or folded over just one half of you, which is exactly why light sleepers and hot sleepers often find it easier.

If you're car camping, I actually recommend blankets over sleeping bags. However, if you are set on a sleeping bag, the sections below cover which features make for the most comfortable ones.

PS - I even put together an article on using blankets when camping, so be sure to check it out!

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Sleeping bag material and comfort

One of the most important factors for comfort is the type of material. Different materials feel different against your skin. They will also vary in thickness, and some are much "noisier" than others, which matters if you're a light sleeper who wakes at every rustle.

A sleeping bag is built in layers: an outer shell, insulation in the middle, and a lining on the inside. Each layer affects comfort in a different way, so it helps to look at them one at a time.

Lining

The lining is the part of the sleeping bag that you'll feel against your skin. Just like different blankets have different feels to them, so do sleeping bags. A lining that feels clammy or slick when you first climb in can be enough to ruin the first hour of sleep.

Here's a summary of the different types of sleeping bag lining and which are the most comfortable:

• Synthetic: These are linings such as nylon, polyester and taffeta. Since these are synthetic, they aren't the most comfortable choice.
• Blends: Having a blend of different fabrics can make the lining more comfortable. This is usually polycotton, which is a blend of cotton and synthetic material. The more cotton, the more comfortable the lining will be.
• Silk: Silk lining is considered to be very comfortable, though it is less durable, so it's not the best choice for a rugged outing.

Slick synthetic linings aren't all bad. They dry quickly and shrug off wear, which is why they're so common. If your bag has one and you find it unpleasant, a separate liner is an easy fix, and I've covered whether sleeping bag liners actually work in its own article.

Insulation

Another big factor in sleeping bag comfort is the type of insulation. Insulation is the material situated between the sleeping bag's outer shell and its lining. Its job is to trap warm air around your body, which retains and maintains heat. The more evenly it does that, the fewer cold spots you notice at 3 a.m. and the less you fidget.

Here are the two main types of insulation:

• Down: Down is basically goose feathers. They are super light and easily compressible. It also keeps the temperature consistent longer than a synthetic filler, which means you'll feel more comfortable longer. Down is also very easy to move in. The drawback to down is that when wet it loses its insulation ability pretty quickly.
• Synthetic: The synthetic filler is more often than not less expensive than down sleeping bags. It also retains heat even when wet. It still doesn't perform as well when it comes to comfort level compared to down, but it can be a great alternative.

If you want to read more on what down actually is, down feathers have a decent general write-up. The practical point for campers is the wet-weather trade-off. Where damp is likely, synthetic is the forgiving choice. Where it's dry and weight or packed size matters, down is hard to beat for comfort. Whichever you pick, a bag that is compressed too hard for too long won't loft properly, so store it loose when you're home.

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Rectangle or mummy: which shape is more comfortable?

For me, what makes sleeping bags the most uncomfortable is that they are restricting. I can't move in them or curl up as easily. If you sleep on your side with your knees drawn up, or you toss and turn, shape matters more than almost any other feature.

Here are the different shapes of sleeping bags and how comfortable they are:

• Rectangle: These sleeping bags are the most roomy and are great for car camping or if you're staying somewhere else indoors that doesn't have blankets. They can even be unzipped fully and used more like a quilt or blanket.
• Mummy: These mummy-shaped sleeping bags are designed to keep you warmer. This means they'll take the shape of your body and leave you with little room to move around. However, they are a lot warmer than rectangle bags.

The reason a mummy bag is warmer is simple. There's less empty space inside for your body to heat, and the hood lets you close the opening around your head. That same snug cut is what makes it feel confining. It's a straight trade between warmth and freedom of movement, so choose based on where you'll camp. A rectangle bag is the easier pick for mild nights near the car, and a mummy bag only earns its restrictiveness when the temperature really drops.

Temperature ratings and men's and women's bags

Picture someone borrowing a bag for summer camping without checking it, only to find it was a winter bag. They wake up sweating, can't settle, and give up on the bag altogether. It happens easily, and it's a good reminder that if you do go with a sleeping bag, you need to pay attention to the temperature ratings.

Temperature ratings on bags can be super confusing. In the US, there's no standard for temperature ratings. That means one company's number may not mean the same as another's, and a listed rating is best read as a rough guide. Usually, you'll want a slightly warmer bag than what you plan on using it for. Also, take into consideration if you are a warm sleeper or cold sleeper.

Ratings often come with a "comfort" figure and a lower "limit" figure. The comfort figure is the one to plan around, since the limit is roughly the point where you can survive the night rather than sleep well. If you see only one number, ask which of the two it is.

And to make matters even more confusing, there are even male and female sleeping bags.

While not always, most often men and women have different body temperatures. Sleeping bags that cater specifically to women can be helpful for your body type.

Temperature rating systems can be found in sleeping bags by companies such as Marmot, Sierra Designs and REI. If you want the bigger picture on how bags are built and rated, the sleeping bag overview on Wikipedia is a reasonable starting point. For colder trips, our roundup of the best winter camping sleeping bags shows what a properly warm bag looks like.

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What about allergies?

Allergies are another point to consider. If you are allergic to down or any other type of material in the sleeping bag, it's not going to be comfortable at all. Sneezing, itchy eyes and a stuffy nose are a poor way to spend a night outdoors.

Down can sometimes cause allergies, not because of the actual down feathers, but because of the dust mites that get lodged in the filler.

If the fill power is higher than 850, the down will be the highest quality of clean and most likely won't have those allergy-causing mites. Fill power is a measure of how much space an ounce of down takes up once it fluffs, so higher numbers mean better loft for the weight, and generally cleaner, more processed down.

A synthetic sleeping bag is a solution if you feel your down sleeping bag is causing problems. Whatever the filling, washing the bag according to its care label and letting it dry fully between trips helps keep dust and moisture from building up inside it.

Alternatives to a sleeping bag

You may be able to get away with not having a sleeping bag at all if you feel their comfort level isn't up to par.

Blankets and quilts are a great option. I prefer to skip the sleeping bag when camping in mild conditions, because I find sleeping bags too restricting. Blankets are much easier to move around in.

Aside from using blankets, here are some other ways to get a comfy sleep:

• Air Mattress: This is a super portable option and can somewhat mimic the feeling of a normal bed. It's large enough to fit more than one person and you can adjust the air level to fit your needs.
• Sleeping Pad: These are thin foam pads that you could use in combination with your sleeping bag but are perfectly capable of providing some comfort by themselves. You'll definitely need a sleeping pad if you are sleeping on the ground.
• Cot: This portable bed folds out and sits on four legs, similar to an actual bed. You'll have a good distance between your mattress and the ground, and you should be able to place this in any sort of terrain and still be comfortable.

One caution on blankets: they don't seal around you the way a bag does, so on a cold night they can leave gaps, and the ground will pull heat out of you from below. That's why a pad or cot is worth pairing with any of these options.

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Sleeping bag comfort tips

If you're still set on using a sleeping bag but want to increase the comfort level, here are a couple of options to maximize your comfort:

• Add a sleeping pad
• Bring pillows
• Choose flat ground
• Wear comfortable clothes

The pad matters most, because much of the cold you feel in a bag comes from the ground squashing the insulation beneath you. Flat ground keeps you from sliding to one end of the tent, and loose, dry clothes stop seams and bunched fabric from digging in. If you're still weighing options, our best sleeping bag guide is a good next stop.

These options can make your experience as comfortable as possible and start your camping lifestyle out on the right foot.