Herbie Murray
Sleeping bags are essential gear for camping, hiking, and outdoor adventures. They come in various shapes, sizes, and price ranges, catering to different user needs and preferences. While some bags prioritize warmth and snug fits, others focus on roominess and comfort. The type of insulation, temperature ratings, and additional features like hoods, zippers, and stash pockets also play a role in the selection process. Proper storage and maintenance of sleeping bags are crucial to ensure their longevity and performance.
| Characteristics | Values |
|---|---|
| Types | Camping, backpacking, and wearable sleeping bags |
| Shapes | Rectangular, semi-rectangular, mummy, and double |
| Materials | Down or synthetic insulation |
| Features | Waterproof shell, snug-fitting hood, extra zippers, stash pocket |
| Price | Starting under $100, with higher-end models over $1000 |
| Temperature Rating | Lower than the lowest expected nighttime temperature |
| Cleaning | Wash periodically to prevent mold, mildew, and dirt build-up |
| Storage | Jumbo cotton storage bag, king-size pillowcase, or commercial dryer |
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What You'll Learn
Sleeping bag shapes: mummy, rectangular, semi-rectangular, and double
Sleeping bags come in various shapes, each catering to different sleeping styles and outdoor scenarios. The four main shapes are rectangular, semi-rectangular, mummy, and double.
Rectangular sleeping bags offer plenty of room for both legs and arms to stretch out, making them ideal for people who move a lot in their sleep or prefer sleeping in different positions. They are also suitable for car camping as they provide a roomier sleeping space and are less expensive to manufacture. Some rectangular bags can be completely unzipped and used as a comforter.
Semi-rectangular bags, also known as modified mummy or barrel-shaped bags, offer a compromise between warmth and roominess. They cover a variety of shapes, some of which may be more suitable for side sleepers.
Mummy bags have a tapered form, wider at the shoulders, and narrower at the feet, resembling a mummy's shape. This design boosts warmth and reduces weight, making them a good choice for backpackers and hikers who need to save space. The snug fit ensures that you roll over with the bag rather than inside it. Mummy bags are also lightweight and more packable, making them suitable for cold-weather camping and mountaineering.
Double sleeping bags are ideal for couples and can be created by zipping together two compatible single bags. They need to be the same model and brand, and a standard double sleeping bag is usually too large and heavy to carry into the backcountry.
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Temperature ratings and insulation types
Temperature ratings are a crucial factor when choosing a sleeping bag. The ISO Test, overseen by the International Organization for Standardization, is the standardised testing method used to assign temperature ratings to sleeping bags. The test involves placing a heavily instrumented electronic mannequin, dressed in long underwear, inside the sleeping bag, which is then placed on a foam sleeping pad. The air temperature is then lowered, and the amount of electrical energy required to maintain the mannequin's initial temperature is measured.
The ISO test provides three temperature thresholds: a comfort rating, a limit rating, and an extreme rating. The comfort rating is the temperature at which the "average female" can sleep comfortably through the night without curling up for warmth. This rating is used for women's bags, as women tend to feel colder than men in the same bag. The limit rating is the temperature at which the "average man" can maintain his body temperature while curled up. This means that he won't be comfortable, but he won't be shivering or at risk of hypothermia. The extreme rating indicates the lowest temperature at which the bag will keep the sleeper alive.
It's important to note that temperature ratings are estimates and don't account for individual differences in body types, clothing, gear, metabolism, and other factors. Therefore, it's recommended to choose a sleeping bag with a lower temperature rating than the lowest expected nighttime temperature at your camping location.
Regarding insulation types, there are two main options: synthetic and down. Synthetic insulation is more affordable, dries faster, and continues to insulate when damp. It's a good choice for damp conditions. Down insulation, on the other hand, is more expensive but performs exceptionally well in cold, dry weather. It is lightweight, durable, and compresses to a small size, making it popular for backpacking bags. For cold and damp conditions, look for down that has been treated to be water-repellent.
In addition to temperature ratings and insulation types, other features to consider when choosing a sleeping bag include the shape, the presence of a hood, zipper features, stash pockets, and the option of a waterproof shell.
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Synthetic vs down insulation
When choosing a sleeping bag, one of the most important decisions you'll have to make is between down and synthetic insulation. The type of insulation will directly affect the warmth, weight, water resistance, compressibility, and price of your sleeping bag.
Down insulation is made from the soft, fluffy, wispy filaments of plumage found underneath the exterior feathers of waterfowl such as ducks and geese. Down is lightweight, durable, compresses small, and performs exceptionally well in cold, dry weather. However, it is more expensive and loses its insulation properties when it gets wet. For cold, damp conditions, you can find down that has been treated to be water repellent.
Synthetic insulation, usually made of polyester, is more affordable, dries faster, and continues to insulate when damp. It is also durable and hypoallergenic. However, synthetic insulation is less durable than down and loses some of its insulating power each time the bag is stuffed into a stuff sack. Synthetic insulation is a good choice for those who want to go camping in damp conditions.
Some manufacturers make sleeping bags with a combination of water-resistant down and synthetic insulation. This hybrid construction can provide the benefits of both materials while limiting each material's imperfections.
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Sleeping bag prices
Shape
Sleeping bags typically come in three shapes: rectangular, semi-rectangular or "modified mummy", and mummy. Rectangular bags tend to be the most spacious, allowing plenty of room for legs and arms to stretch out. They are often the most cost-effective option. Semi-rectangular bags offer a compromise between warmth and roominess, while mummy bags are designed to be more snug to retain warmth and reduce weight. Mummy bags are a popular choice for backpacking due to their compact size and warmth but often come at a higher price point.
Material and Insulation
The material and insulation type also influence the price of a sleeping bag. Synthetic insulation, such as synthetic fibres, is generally more affordable and suitable for damp conditions as it continues to insulate when wet. Synthetic bags are also fast-drying and provide warmth when damp. In contrast, down insulation, typically made from duck or goose feathers, is more expensive but performs exceptionally well in cold, dry weather. Down is lightweight, durable, and highly compressible, making it a popular choice for backpacking despite the higher cost.
Features
Additional features can also increase the price of a sleeping bag. Features such as a waterproof shell, a snug-fitting hood, extra zippers, and stash pockets can enhance durability, warmth, and functionality. These features may be particularly important for camping in cold or wet environments, but they will likely increase the overall cost of the sleeping bag.
Temperature Rating
The temperature rating of a sleeping bag is crucial for ensuring a comfortable night's sleep. Bags with lower temperature ratings, suitable for colder conditions, tend to be more expensive due to the specialised insulation and materials required. However, it's important to consider other factors that influence warmth, such as humidity, wind, and sleeping attire.
In summary, when choosing a sleeping bag, it's essential to consider your specific needs and budget. Sleeping bags can be found at various price points, and by considering factors such as shape, material, features, and temperature rating, you can select the most suitable option for your requirements.
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Storing your sleeping bag
Cleaning
Before storing your sleeping bag, it is important to give it a thorough cleaning. Natural body oils, dirt, and grime can build up on the outer fabric and the insulation fibres over time, reducing the bag's effectiveness and potentially resulting in a cold night's sleep. Spot-clean your bag after every trip by wiping away any dirt or debris from the exterior with a soft toothbrush or a slightly damp cloth. Then, turn the bag inside out and use a dedicated technical soap to spot-clean any stains or dirt marks.
Drying
If your sleeping bag is damp, it is important to dry it thoroughly before storing it. Hang the bag in a cool, dry place, out of direct sunlight, for at least 4 to 6 hours. If you're airing the bag indoors, avoid hot and humid areas, such as cupboards, and use a fan to keep the air moving. You can also use a large commercial dryer, but be sure to set it to low heat and check frequently to avoid damage.
Storage
Once your sleeping bag is clean and dry, it's time to store it. Remove it from its stuff sack, as this is not designed for long-term storage. Instead, place it in a large, breathable cotton or mesh sack, such as the jumbo cotton storage bag that many bags are sold with. If you don't have a large storage bag, you can use a king-size pillowcase or purchase a cotton or mesh sack. Store the bag in a cool, dry place, such as a shelf in a closet or hanging over a rack, to avoid UV damage and moisture.
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Frequently asked questions
You can try contacting the manufacturer of your sleeping bag to see if they sell replacement bags.
If you don't have a sleeping bag bag, you can use a large cotton bag or a king-size pillowcase to store your sleeping bag.
To store your sleeping bag, find a roomy corner in your closet. Avoid storing your sleeping bag in damp places like basements, or unheated spaces like garages and attics.
It is recommended to wash your sleeping bag periodically, especially if you use it often. You can use a large commercial dryer and toss in a few clean tennis balls to fluff up the fill. Always dry your sleeping bag on low heat and check it frequently.
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