
A good night's sleep is essential for a successful camping trip, and a great sleeping bag can make your overnights in the outdoors more comfortable and fun. Sleeping bags come in various shapes, sizes, and materials, and the right one for you will depend on factors such as the climate, your budget, and whether you're car camping or backpacking. If you're backpacking, you'll want a lightweight bag that packs down small, while car camping allows you to choose a plush, roomy bag without worrying about bulk or weight. Temperature ratings are also important, as you'll want a bag that will keep you warm in the temperatures you expect to encounter.
| Characteristics | Values |
|---|---|
| Purpose | Car camping or backpacking |
| Temperature rating | Lower than the lowest expected temperature |
| Shape | Rectangular, semi-rectangular, mummy, double |
| Size | Regular, long, short |
| Material | Synthetic, down |
| Features | Stash pocket, draft-blocking details, hood, extra zippers |
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What You'll Learn
- Sleeping bag shapes: rectangular, semi-rectangular, mummy, and double
- Temperature ratings: choose a rating below the lowest anticipated temperature
- Weight: consider the weight of the bag and its insulation
- Size: sleeping bags come in regular, long, and short sizes
- Features: pockets, hoods, and draft-blocking details add durability and warmth

Sleeping bag shapes: rectangular, semi-rectangular, mummy, and double
When choosing a natural sleeping bag, one of the most important factors to consider is its shape. Sleeping bags generally come in four shapes: rectangular, semi-rectangular, mummy, and double. Each shape has its own advantages and disadvantages, catering to different sleeping styles and outdoor scenarios. Here's a detailed overview of each type:
Rectangular Sleeping Bags
Rectangular sleeping bags offer plenty of room for both legs and arms to stretch out, making them ideal for those who move around a lot in their sleep or prefer different sleeping positions. They usually have more space and are more comfortable. Some rectangular bags can be completely unzipped and used as comforters. However, they tend to be bulkier and may not retain heat as efficiently as other shapes, especially in colder temperatures.
Semi-Rectangular Sleeping Bags
Also known as "modified mummy" or "barrel" shapes, semi-rectangular sleeping bags offer a compromise between warmth and roominess. They come in a variety of shapes, providing a balance between the spaciousness of rectangular bags and the warmth of mummy bags. This shape is suitable for those who want more space than a traditional mummy bag but don't want to sacrifice too much warmth.
Mummy Sleeping Bags
Mummy sleeping bags have a tapered form, wider at the shoulders and narrower at the feet, resembling a mummy's shape. Their snug fit boosts warmth and reduces weight, making them ideal for backpackers and hikers concerned about space and weight constraints. Mummy bags are more lightweight and packable, and they retain heat more efficiently due to their reduced internal air volume. However, some people may find them restrictive and uncomfortable, especially side sleepers or those who move around frequently during sleep.
Double Sleeping Bags
Double sleeping bags are designed for couples who want to sleep together in the same bag. They are typically much larger and heavier than single bags, making them impractical for backcountry adventures. However, you can create a double sleeping bag by purchasing two single bags with compatible zippers and zipping them together. This option provides more flexibility, as the bags can be used separately or combined, depending on the situation.
When choosing a sleeping bag shape, consider your sleeping habits, the temperature range you'll be using it in, and the amount of space and weight you can accommodate. The perfect sleeping bag shape will depend on your specific needs and preferences, ensuring you get a good night's sleep during your outdoor adventures.
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Temperature ratings: choose a rating below the lowest anticipated temperature
When choosing a sleeping bag, one of the most important factors to consider is its temperature rating. This is because waking up in the middle of the night due to cold temperatures can ruin your outdoor experience. Therefore, it is crucial to select a sleeping bag with a temperature rating that is lower than the lowest anticipated temperature at your campsite.
Sleeping bag temperature ratings can be confusing, as they are based on standardised tests that simulate how a sleeping bag should be used. The tests involve placing a mannequin dressed in base layers inside the sleeping bag on a sleeping pad inside a cold chamber. As the temperature drops, sensors on the mannequin measure the warmth of the bag. While these tests provide a standardised way to compare different bags, it's important to remember that they are based on "'average' sleepers", and other factors can affect your experience, such as your metabolism, clothing, and the humidity and wind conditions at your campsite.
To ensure you stay warm enough, it's generally recommended to choose a sleeping bag with a temperature rating below the lowest expected temperature during your trip. For example, if you're camping in an area where the temperature is expected to drop to 20°F (-6.7°C), you should consider a three-season sleeping bag rated for temperatures down to 20°F or lower. Similarly, if you're camping in winter conditions with temperatures below 20°F, a winter bag rated for temperatures below 20°F is necessary.
It's worth noting that temperature ratings on sleeping bags are rounded to the nearest 0 or 5, so a bag named "Snugglebuggle 15" might actually have a lower limit rating of 18°F. Therefore, it's essential to look at the actual test rating on the bag rather than relying solely on the name. Additionally, women's sleeping bags typically use the comfort rating, which is the temperature at which a cold sleeper might still feel comfortable, while men's bags use the lower limit rating.
In summary, when choosing a sleeping bag, opt for one with a temperature rating below the lowest anticipated temperature at your campsite. This will ensure you stay warm and comfortable throughout your outdoor adventure.
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Weight: consider the weight of the bag and its insulation
When choosing a sleeping bag, weight is an important factor to consider. If you're car camping, you don't need to worry about the weight of your bag, and you can opt for a warmer, roomier option. However, if you're backpacking or hiking, you'll want to minimise weight and bulk. In this case, it's crucial to select the lightest and most packable bag within your budget that will still ensure a good night's sleep.
The weight of a sleeping bag is influenced by the type of insulation it uses. Synthetic insulation is more affordable, dries faster, and provides warmth even when damp. On the other hand, down insulation is known for being lightweight, durable, and highly compressible. It's important to note that down bags are usually more expensive and may require special care to maintain their insulating properties.
When it comes to weight, the shape of the sleeping bag also plays a role. Mummy-shaped bags, for instance, are designed to boost warmth and reduce weight by having a snug fit. This means you roll over with the bag instead of inside it, which can feel constrictive to some people. On the other hand, rectangular bags offer plenty of room for legs and arms to stretch out, but they are bulkier and heavier.
If you plan to use your sleeping bag for both car camping and backpacking, it's generally recommended to choose a backpacking style. This is because you'll need it to be lightweight and compact when carrying it in a pack. Additionally, consider the weight of the insulation and the overall packed size of the bag when making your decision.
Some lightweight options for backpacking include the Feathered Friends Swallow YF 20 Sleeping Bag, the Montbell Down Hugger 650 #1, and the Big Agnes Sidewinder SL 20°. These bags offer a good balance between weight and warmth, making them ideal for those who prioritise portability without compromising comfort.
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Size: sleeping bags come in regular, long, and short sizes
When it comes to finding a natural sleeping bag, size is an important consideration. Sleeping bags typically come in three sizes: regular, long, and short.
Firstly, let's talk about the regular size. Regular sleeping bags are suitable for individuals who fall within the average height range. If you're on the taller side, you may find that a regular bag feels a bit snug, but it should still provide adequate space for a comfortable night's sleep.
For taller individuals, a long sleeping bag is the way to go. These bags offer extra length, ensuring that even those over 6 feet tall have plenty of room to stretch out. If you're of above-average height, opting for a long bag can mean the difference between a restful night and a cramped, uncomfortable experience.
On the other hand, if you're of a shorter stature, you might find that a short sleeping bag is the perfect fit. Short bags are designed for individuals who are below the average height, providing a more compact and cosy option. They are also ideal for those looking to save weight, as a smaller bag means less material and, consequently, a lighter load to carry.
It's worth noting that sleeping bag sizes can vary slightly between brands, so it's always a good idea to check the specific measurements provided by the manufacturer. Additionally, if you're close to the upper limit of a size range, it's recommended to try both that size and the next one up to determine which offers the best fit for your needs and preferences.
Finally, keep in mind that sleeping bags are not a one-size-fits-all proposition. The right size for you will depend on factors such as your height, build, and personal preferences for space and comfort. So, take the time to consider your individual needs and choose a sleeping bag size that aligns with those requirements.
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Features: pockets, hoods, and draft-blocking details add durability and warmth
When choosing a natural sleeping bag, it's important to consider the features that will make your bag work best for you. Pockets, hoods, and draft-blocking details are some of the features that can add durability and warmth to your sleeping bag.
A stash pocket can be a handy addition to your sleeping bag, providing a safe and easily accessible spot to store small items like a watch, lip balm, or other essentials. Some sleeping bags also feature a pillow pocket, which allows you to stuff clothes inside to create a pillow, enhancing your comfort.
Hoods offer significant benefits in terms of warmth, especially when they have a snug fit and can be cinched tightly around your head. Mummy-shaped sleeping bags, designed for backpacking, often include contoured hoods that can be adjusted for greater warmth. The hood is a key factor in the overall warmth of the bag, and you will typically find snug-fitting hoods on bags with lower temperature ratings.
Draft-blocking details are essential in preventing warm air from escaping and cold air from entering the sleeping bag. Draft tubes run the length of the bag behind the zipper, while draft collars or yokes are found at the top of the bag around your neck, both working to retain warmth.
When selecting a sleeping bag, it's important to consider the combination of features that suit your needs. Pockets, hoods, and draft-blocking details are just a few of the elements that contribute to the durability and warmth of your sleeping bag, ensuring a comfortable and functional experience.
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Frequently asked questions
The key factors to consider are the temperature rating, the type of insulation, the weight, and the shape of the bag.
Camping bags are usually more spacious, while backpacking bags tend to be lighter and more compact. If you need a sleeping bag for both activities, it is generally recommended to go for a backpacking style.
Some highly-rated natural sleeping bags for camping include the Alps OutdoorZ Redwood, the Big Agnes Sidewinder SL 20°, and the Feathered Friends Swallow YF 20.











































