Gina Johnson
When choosing a sleeping bag, there are several factors to consider. The type of sleeping bag you need will depend on the environment and conditions in which you'll be using it. For example, if you're car camping, you can choose a warmer and roomier bag, whereas if you're backpacking, you'll want a lighter and more compact bag. The temperature rating of the bag is also important, as you'll want to ensure it can keep you warm in the expected conditions. Other features to look out for include the shape of the bag, the type of insulation, and additional features such as hoods, draft-blocking tubes, and water-repellent finishes. It's also a good idea to try out different bags to find the most comfortable option for you.
| Characteristics | Values |
|---|---|
| Shape | Rectangular, semirectangular, mummy, double |
| Insulation | Down, synthetic |
| Temperature rating | Depends on the expected temperature; a rating of around 30°F suits various conditions |
| Weight | Lightweight bags are better for backpacking |
| Size | Smaller bags are better for backpacking |
| Water repellence | Most bags have some type of light water repellence |
| Storage | A stuff sack is good for transportation, while a storage sack is better for long-term storage |
| Liner | A soft liner keeps the bag clean and adds extra warmth |
| Hood | Offers added warmth, especially with differentiated drawcords |
| Draft-blocking features | Draft tubes and draft collars prevent warm air from escaping |
| Zipper | Anti-snag zippers are useful; left or right zip is important for couples |
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What You'll Learn
- Shape and size: Rectangular, semi-rectangular, or mummy-shaped bags offer different benefits
- Insulation: Down or synthetic fillings have pros and cons for warmth, weight, and cost
- Temperature rating: Bags are rated for different temperatures, with lower ratings for colder climates
- Storage: Stuff sacks and storage sacks are used for different storage needs
- Features: Hoods, draft-blocking tubes, and anti-snag zippers improve warmth and comfort
Shape and size: Rectangular, semi-rectangular, or mummy-shaped bags offer different benefits
Sleeping bags come in three basic shapes: rectangular, semi-rectangular, and mummy. Each shape offers different benefits. Rectangular sleeping bags are popular among campers as they allow plenty of room for both legs and arms to stretch out. Some rectangular bags can be fully unzipped and used like a comforter. They are also commonly used for car camping, where bulk and weight are less of a concern.
Semi-rectangular sleeping bags, also known as "modified mummy" or "barrel" shapes, offer a compromise between warmth and roominess. This designation covers a variety of shapes, providing options for those who want a balance between the spaciousness of a rectangular bag and the warmth and weight benefits of a mummy bag.
Mummy-shaped bags are designed to boost warmth and reduce weight, making them ideal for backpacking. They have a snug fit, and you roll over with the bag rather than inside it. Mummy bags are lighter and more packable, making them a popular choice for those who need to carry their gear on backpacking trips.
The weight of a sleeping bag is influenced by its shape, with sleek and snug bags being lighter than roomier options. The shape of the bag also affects its warmth, as bags with more room tend to have lower temperature ratings. Additionally, the insulation type and fill weight impact the bag's overall weight and warmth.
When choosing a sleeping bag, it's essential to consider the intended use, whether it's for car camping, backpacking, or both. Car campers prioritize comfort and space, while backpackers focus on weight, packability, and warmth. By balancing these factors, individuals can select a sleeping bag that suits their specific needs and preferences.
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Insulation: Down or synthetic fillings have pros and cons for warmth, weight, and cost
When choosing a sleeping bag, one of the most important decisions you'll make is the type of insulation. The insulation type directly affects the warmth, weight, water resistance, compressibility, and price of sleeping bags. Down and synthetic fillings have their own pros and cons.
Down insulation is made from the soft, wispy plumage found underneath the exterior feathers of waterfowl, such as geese and ducks. It is a natural product with an excellent thermal insulation-to-weight ratio. Down sleeping bags can be extremely heavily compressed over a short period of time without losing their properties. Down bags are more expensive on average than synthetic insulation. They are sought after because they are lighter, more compressible, and more durable. Down fill retains a more consistent level of warmth for a longer period of time. With proper care and maintenance, a down sleeping bag can last for 10+ years.
Synthetic fillings, on the other hand, tend to break down faster, typically needing replacement within 3 to 5 years. Synthetic insulation is generally less expensive to produce. Synthetic sleeping bags are often said to be lower-maintenance compared to down, but the difference is minor. Synthetic insulation is quick-drying and insulates even if wet, something down struggles to do. Synthetic sleeping bags can become relatively heavy when required for lower temperatures. Synthetic sleeping bags cannot be compressed as much as their down counterparts.
Overall, down sleeping bags are ideal for those seeking a durable, lightweight, and highly compressible option, while synthetic sleeping bags are a more affordable and water-resistant alternative.
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Temperature rating: Bags are rated for different temperatures, with lower ratings for colder climates
When choosing a sleeping bag, one of the most important factors to consider is its temperature rating. This is because the temperature rating indicates the lowest temperature at which the bag will keep you warm. Waking up in the middle of the night shivering is an unpleasant experience, so it's crucial to select a bag with an appropriate temperature rating.
The temperature rating of a sleeping bag is determined through standardized testing, such as the ISO (International Standards Organization) Test, which replaced the EN (European Norm) standard. The ISO Test involves placing an electronic mannequin, dressed in long underwear, inside the sleeping bag, which is then placed on a foam sleeping pad. The air temperature is gradually lowered, and the amount of electrical energy required to maintain the mannequin's initial temperature is measured. This process is repeated to correlate the results with real-world outcomes, allowing for an accurate prediction of the comfort level a person can expect from the bag.
It's important to note that temperature ratings are estimates and not precise indicators of comfort. The lab testing conditions attempt to simulate real-world usage, but they cannot account for various factors such as differences in clothing, gear, body types, weather conditions, and individual variations in sleeping habits. Therefore, it's advisable to choose a bag with a temperature rating slightly lower than the coldest temperature you anticipate encountering. This way, you can always open up the bag if the conditions are warmer, but you also have the option to close it up if the temperature drops unexpectedly.
Sleeping bags typically come with three temperature ratings: Comfort, Limit, and Extreme. The Comfort rating indicates the temperature at which a "standard woman" can sleep comfortably through the night without curling up for warmth. The Limit rating, also known as the Lower Limit, is based on a "standard man" maintaining thermal equilibrium in a curled-up position without shivering or risking hypothermia. The Extreme rating, indicated by "EN" in some bags, means a woman won't die of hypothermia within six hours at that temperature. It's worth mentioning that these ratings are based on averages, and individual preferences and needs may vary.
When selecting a sleeping bag, it's recommended to consider your unique situation. If you live in a colder climate, opting for a warmer model with a lower temperature rating is advisable. On the other hand, if you're planning a summer camping trip in a warmer region, a bag with a higher temperature rating may be more suitable. Additionally, factors such as insulation type, fill weight, and shape can also impact the warmth and weight of the sleeping bag, so they should be considered in conjunction with the temperature rating.
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Storage: Stuff sacks and storage sacks are used for different storage needs
When it comes to storing your sleeping bag, stuff sacks and storage sacks are used for different needs. A stuff sack is ideal for when you need to transport your sleeping bag, as it will take up less space in your vehicle. However, it is not recommended to keep your sleeping bag permanently stored in a stuff sack, as it can compromise the insulation. Therefore, many sleeping bags also come with a large mesh or cotton storage sack for long-term storage.
The type of storage sack you use will depend on the filling of your sleeping bag. Down filling, made from duck and goose feathers, is lighter, more compressible, and more durable than synthetic filling. However, down loses its insulating properties when wet, so it is important to keep your down sleeping bag dry. Synthetic sleeping bags, on the other hand, are more affordable and are a good choice for beginners or occasional backpackers. They are also a good option for car camping, as they are fine for warmer temperatures.
If you are planning to do both camping and backpacking, it is recommended to go with a backpacking bag. Backpacking bags are designed to be lightweight and compact, making them ideal for carrying in a pack. On the other hand, camping bags offer more room to move around in. When choosing a backpacking bag, pay attention to the temperature rating, as this will indicate the lowest temperature at which the bag will keep you warm.
To summarise, stuff sacks are ideal for transporting your sleeping bag, while storage sacks are better for long-term storage. The type of filling your sleeping bag has will also influence your storage needs, with down filling requiring more care to keep it dry and maintain its insulating properties.
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Features: Hoods, draft-blocking tubes, and anti-snag zippers improve warmth and comfort
When choosing a sleeping bag, campers tend to look for bags that offer ample room to stretch out and roll over, while backpackers are more concerned with the warmth-to-weight ratio of a sleeping bag. Sleeping bags with hoods, draft-blocking tubes, and anti-snag zippers can improve warmth and comfort.
A hood offers added warmth, especially when cinched tightly around your head. Some hoods include "differentiated drawcords," which have different thicknesses, allowing you to adjust the neck fit and hood opening with ease. Mummy-shaped sleeping bags, for instance, have a hood that can be tightened to retain heat. If your bag does not have a hood, consider wearing a beanie to prevent heat loss through your head.
Draft-blocking features are designed to prevent warm air from escaping. Draft tubes run the length of the bag behind the zipper, acting as a barrier to keep the warm air inside. Similarly, draft collars or yokes are found at the top of the bag, preventing warm air from escaping around your neck.
Anti-snag zippers are another feature that improves the functionality of your sleeping bag. Snagging the zipper can be annoying and cause wear and tear on the fabric. Some bags have a full-length guard that shields the zipper, while others have a cover over the zipper itself to prevent snagging.
In addition to these features, other ways to improve warmth include using a sleeping bag liner, an insulating pad, and a tent. A liner can add extra warmth and help keep your bag clean, while an insulating pad can reduce heat loss through conduction. A tent provides an enclosed space to retain warmth and protect against windchill.
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Frequently asked questions
Sleeping bags come in three basic shapes: rectangular, semirectangular (or "modified mummy"), and mummy. Rectangular bags allow plenty of room for both legs and arms to stretch out, while mummy bags are more snug to boost warmth and cut weight. Semirectangular bags offer a compromise between warmth and roominess. There are also double sleeping bags for couples.
If you're car camping, you don't need to worry as much about weight or bulk, so you can prioritise warmth and comfort. Look for a bag that suits your budget and the climate you'll be camping in. If you're backpacking, you'll want a bag that's light, warm, and compressible.
Sleeping bags can be insulated with down fill or synthetic fill. Down is generally more expensive, lighter, more compressible, and durable, but it loses its insulating power when wet. Synthetic insulation is more affordable and water-resistant, but less efficient in terms of warmth-to-weight ratio.
Some features to consider include a hood for added warmth, draft-blocking tubes and collars to prevent warm air from escaping, and anti-snag zippers. You may also want to look for a bag with a storage sack to protect the insulation when not in use and a sleeping bag liner to keep it clean and add extra warmth.
