Herbie Murray
When it comes to backcountry camping, choosing the right sleeping bag is essential for a good night's sleep. Sleeping bags come in various shapes, weights, and temperature ratings, so it's important to consider your specific needs and preferences. Backpacking bags tend to be more lightweight and snug compared to camping bags, and the weight of a sleeping bag is often related to its warmth and insulation. Down-filled bags, for example, offer a superior warmth-to-weight ratio but may be more expensive. Mummy bags are tapered and snug, maximizing warmth and minimizing weight, while rectangular bags offer more room to move around but add bulk. When selecting a sleeping bag, it's crucial to consider the temperature rating, which indicates the lowest temperature the bag is designed for, and choose one that suits the anticipated temperatures on your trips.
| Characteristics | Values |
|---|---|
| Temperature rating | Choose a bag with a rating slightly lower than the lowest temperature you expect to encounter |
| Sleep system | Comfort depends on variables such as the R-value of your sleeping pad |
| Type of insulation | Down vs. synthetic. Down has a better warmth-to-weight ratio but synthetic options are more compact |
| Weight | A sleek shape and snug fit will be lighter than a roomy bag |
| Shape | Mummy, semi-rectangular, rectangular |
| Sleeping pad compatibility | Some bags have a sleeve for a sleeping pad, while others have pad loops for straps |
| Pillow pocket | Some bags have a pocket for clothes to create a pillow |
| Fabric | Outer shell is typically ripstop nylon or polyester with a water-repellent finish. Lining fabrics have a brushed texture |
| Stuff sack | Some bags come with a stuff sack to compress the bag for packing |
| Fill | Bags with more down fill are warmer but heavier |
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What You'll Learn
- Sleeping bag shape: mummy bags are snug and lightweight, rectangular bags offer more room
- Temperature rating: choose a bag rated slightly lower than the lowest anticipated temperature
- Sleep system: the R-value of your sleeping pad impacts comfort at a particular temperature
- Type of insulation: down vs. synthetic
- Sleeping bag liner: adds extra warmth and keeps the bag clean
Sleeping bag shape: mummy bags are snug and lightweight, rectangular bags offer more room
When it comes to backcountry camping, the weight and shape of your sleeping bag are important considerations. Mummy bags and rectangular bags each have their own advantages and disadvantages in terms of warmth, weight, comfort, and portability.
Mummy bags are designed to be snug and lightweight. They have a slim cut and a contoured hood that can be cinched tight to maximise warmth. The overall fit is snug, and you typically roll over with the bag rather than inside it. Mummy bags are ideal for backpackers as they take up less space and weigh less, making them highly portable. They are also suitable for colder temperatures as there is less internal air to heat up and they require less material and insulation. However, the tapered design may be uncomfortable for side or front sleepers and those who are tall, broad-shouldered, or larger than average. Some people may also find mummy bags restrictive or claustrophobic.
Rectangular bags, on the other hand, offer more room and accommodate different sleeping styles by allowing you to move around inside the bag. They are ideal for side sleepers, front sleepers, and those who move around a lot at night. Rectangular bags provide a more comfortable and spacious sleeping experience. However, they are bulkier and heavier, making them less portable and better suited for car camping than backpacking. Rectangular bags may also take longer to warm up, especially in colder temperatures, as they have more internal air to heat up and require more insulation.
The decision between a mummy bag and a rectangular bag depends on personal preferences, sleeping styles, budget, and the type of camping you plan to do. Mummy bags are generally recommended for backpackers due to their lightweight and compact design, while rectangular bags are preferred for car camping or those who prioritise comfort and roominess.
Additionally, it is worth considering other factors when choosing a sleeping bag for backcountry camping, such as temperature ratings, insulation type (down vs synthetic), and sleep system compatibility. Selecting a bag with a suitable temperature rating for the anticipated temperatures is crucial, and the R-value of your sleeping pad also plays a role in your overall comfort.
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Temperature rating: choose a bag rated slightly lower than the lowest anticipated temperature
When choosing a sleeping bag for backcountry camping, the temperature rating is a key consideration. Sleeping bags are designed to keep an "average sleeper" warm at the temperature they are rated for. Therefore, it is recommended to select a bag with a temperature rating that is slightly lower than the lowest temperature you expect to encounter.
The temperature rating of a sleeping bag is based on lab-tested standards, with most brands now following the European Norm (EN) or the newer International Standards Organization (ISO) system. These standards provide two numbers: "comfort" (comfort rating for women) and "lower limit" (comfort rating for men). The "lower limit" rating is always lower than the "comfort" rating and indicates the temperature at which a warm sleeper might still feel comfortable.
However, it's important to remember that real-world comfort may not match lab-tested temperature ratings due to various variables that a lab cannot simulate. These variables include differences in clothing and gear, body types, metabolism, humidity, wind, and more. Therefore, when choosing a sleeping bag, it is wise to consider your personal preferences and factors that may affect your comfort.
Additionally, other features of the sleeping bag can impact its warmth. For example, a snug-fitting hood can make a bag much warmer, so they are more commonly found on bags with lower temperature ratings. The type of insulation and the bag's shape also play a role in its warmth and weight. A bag with a sleek shape and a snug fit, such as a mummy bag, will be lighter and provide more warmth than a roomier bag.
When in doubt, choosing a bag with a lower temperature rating is generally recommended, as you can always open up the bag to cool down if conditions become too warm. However, it is important to consider the trade-off between warmth and weight, as a warmer bag will typically be heavier and bulkier. Ultimately, the decision depends on your specific needs and preferences for your backcountry camping trip.
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Sleep system: the R-value of your sleeping pad impacts comfort at a particular temperature
When it comes to backcountry camping, the weight of your sleeping bag is an important consideration. A sleeping bag will be one of the heavier and bulkier items in your pack, so it's worth spending time evaluating your sleep system.
A key component of your sleep system is the sleeping pad. The R-value of your sleeping pad will impact your comfort at a particular temperature. R-value measures a sleeping pad's resistance to heat loss to the ground when you lie on it. It is not a direct measure of warmth, but of a pad's ability to prevent the loss of the warmth generated by your body. The higher the R-value, the more effective the pad is at preventing heat loss.
R-values for sleeping pads typically range from 1 to 7, with thicker and less portable camping mattresses having higher values. It's important to note that R-value is a standalone rating system and does not directly correspond to temperature. The correlation between air temperature and R-value can be tricky to interpret, as there are many other factors at play when it comes to comfort, including the warmth of your sleeping bag, your metabolism, your sleeping position, and the weather conditions.
To maximize the potential of your sleep system, it's important to consider both the temperature rating of your sleeping bag and the R-value of your sleeping pad. Therm-a-Rest designers claim that a pad with an R-value of at least 4.0 is needed to maximize a sleeping bag's temperature rating. For example, if your sleeping bag is rated for 20 degrees Fahrenheit, a pad with an R-value of 4.0 or higher is recommended to be comfortable at that temperature.
Sleeping pads with higher R-values can provide additional insulation and comfort for sound sleeping. Air pads, for instance, are known for being incredibly comfortable and lightweight, while also being the most compact type of pad when packed. Self-inflating pads, on the other hand, offer a combination of insulation and air, providing excellent insulation and the ability to adjust firmness.
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Type of insulation: down vs. synthetic
When choosing a sleeping bag for backcountry camping, the type of insulation is a key consideration. Sleeping bags can be filled with either down or synthetic insulation, and each type has its own pros and cons.
Down sleeping bags are made from the feathers of ducks or geese and are known for their excellent warmth-to-weight ratio. They are incredibly lightweight, compressible, and can be packed down into small sizes, making them ideal for backpacking. Down is also highly resilient, capable of maintaining its fluffy warmth even after repeated use and stuffing. With proper care, a down sleeping bag can last for decades. However, down has a major disadvantage when it comes to moisture. When down gets wet, it loses its insulating properties, making it unsuitable for rainy or damp environments. To address this issue, some manufacturers have started treating down with hydrophobic coatings to make it water-resistant.
On the other hand, synthetic sleeping bags are made from man-made materials such as polyester or nylon. Synthetic insulation is generally less expensive than down and requires less care to maintain its performance. Synthetic bags are a good option for those starting out with car camping or backpacking, as they are more affordable and the weight and packed size are less important factors. Synthetic insulation is also perfect for warm weather when less thickness and insulation are needed. However, synthetic bags tend to be bulkier and heavier than down bags, and they may not provide the same level of warmth-to-weight ratio.
The decision between down and synthetic insulation depends on various factors, including your budget, the climate and environment of your camping trip, the length of your trip, and your personal preferences. It's important to carefully consider these factors and do your research before making a purchase.
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Sleeping bag liner: adds extra warmth and keeps the bag clean
When backcountry camping, it's important to consider the weight and warmth of your sleeping bag. Mummy-shaped sleeping bags are designed to boost warmth and reduce weight, making them a popular choice for backpackers. They have a slim cut and a contoured hood that can be tightened for added warmth. The overall fit is snug, and you roll over with the bag rather than inside it.
To add extra warmth and keep your bag clean, consider using a sleeping bag liner. Liners are available in various materials, each offering unique benefits. Silk liners, for instance, are very lightweight (around 5 oz.) and compact. They insulate well in cold weather and are absorbent and breathable in warmer conditions. Synthetic liners, such as those made with CoolMax®, are moisture-wicking and breathable, making them ideal for humid environments. They also offer some stretch, which restless sleepers may appreciate. Insulated liners, like those made with Thermolite®, can add up to 25°F of warmth, allowing you to extend the range of your lightweight bag. They use hollow-core fiber insulation, which helps them dry 50% faster than cotton.
Sleeping bag liners not only provide additional warmth but also protect your sleeping bag from dirt and body oils, helping to extend its lifespan. Liners are generally easier to launder than sleeping bags, and their use can reduce the need for frequent cleaning of the bag itself. Some liners, such as those with built-in bug protection, can also provide additional benefits for outdoor adventures.
When choosing a sleeping bag, it's essential to consider the temperature ratings and select one rated slightly lower than the typical low temperatures you anticipate encountering. Additionally, the type of insulation, weight, and shape of the bag will influence your decision. Backpacking sleeping bags are designed to be lightweight, pack down small, and provide efficient warmth for their weight.
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Frequently asked questions
The weight of your sleeping bag depends on several factors, including the shape, type of insulation, and temperature rating. Mummy-shaped bags are snug and lightweight, while rectangular bags are roomier but heavier. Down insulation is lighter and more compact than synthetic insulation but may be less ethical. The lower the temperature rating, the heavier the bag. A good balance between warmth and weight is key.
Mummy-shaped bags are the lightest option as they have a slim cut and a contoured hood. They are, however, the least spacious design. Rectangular bags are roomier but add considerable weight. Semirectangular bags offer a compromise between warmth and space.
Down insulation offers a superior warmth-to-weight ratio and packs down smaller than synthetic insulation. However, synthetic insulation is generally more affordable and ethical.
Warmer bags have more insulation and require more fabric, making them heavier. A bag with a lower temperature rating will be lighter but may not provide sufficient warmth in cold conditions.
Some recommended lightweight sleeping bags for backcountry camping include the Feathered Friends Hummingbird UL 30, Mountain Hardwear Bishop Pass 15, Sea to Summit Spark 15, and Enlightened Equipment Enigma.
