Evie Summers
When you're backpacking, a good night's sleep is essential, and a sleeping bag is a key piece of equipment. Sleeping bags for backpacking are different from those for camping in that they are more lightweight, pack down smaller, and are more efficient in terms of warmth-to-weight ratio. When choosing a backpacking sleeping bag, it's important to consider the temperature rating, the type of insulation, and the weight of the bag. Down insulation is generally more expensive, lighter, more compressible, and durable than synthetic insulation. However, synthetic insulation will continue to insulate when wet. Other features to look out for include draft tubes, draft collars, and pillow pockets.
| Characteristics | Values |
|---|---|
| Weight | Lightweight |
| Packed Size | Smaller |
| Warmth | Warmer |
| Temperature Rating | Lower than the lowest anticipated temperature |
| Insulation | Down or synthetic |
| Price | Expensive |
| Zippers | Multiple zippers for venting |
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Weight and warmth
When it comes to backpacking sleeping bags, weight and warmth are two of the most important factors to consider. The ideal weight range for a sleeping bag is generally considered to be between 1 and 3 pounds (500 grams to 1.5 kilograms). While a heavier bag can provide more warmth and comfort, it also means carrying more weight during the day, which can be a burden when travelling long distances or navigating difficult terrain.
Lighter bags are designed to minimise the load, reducing strain on the body and increasing mobility. However, it is crucial to find a balance between weight and warmth, as a bag that is too light may not provide sufficient warmth or comfort. Ultralight sleeping bags, for example, use feather-light materials and less insulation, which can compromise comfort and warmth in colder environments.
The type of insulation is a major factor in the weight of a sleeping bag. Down insulation is typically lighter and more compressible than synthetic insulation, offering a superior warmth-to-weight ratio. It is often favoured by ultralight backpackers despite being more expensive and less effective when wet. Synthetic insulation, on the other hand, is heavier and less compressible than down, making it bulkier, but it is more affordable and continues to insulate when damp or wet.
The temperature rating of a sleeping bag also directly influences its weight. Bags designed for colder conditions have more insulation and are therefore heavier, while those made for summer camping have less insulation and are lighter. It is important to consider the typical temperatures you will encounter on your hikes to avoid carrying unnecessary weight or risking cold, uncomfortable nights.
In addition to insulation type and temperature rating, the shape of the sleeping bag can also impact its weight. Mummy-shaped bags, for instance, are tapered towards the legs, reducing weight and extra space. The distribution of insulation between the bag's liner and outer shell is another factor that influences weight and warmth, with the goal of achieving an even distribution to avoid cold spots.
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Temperature ratings
When choosing a backpacking sleeping bag, one of the most important factors to consider is its temperature rating. This is because the rating will determine how warm you will be when sleeping outdoors.
Sleeping bags are typically given two temperature ratings: a "comfort" rating and a "limit" or "lower-limit" rating. The "comfort" rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and is generally the temperature assigned to women's bags. The "limit" rating is the lowest temperature at which the bag will keep a "warm sleeper" comfortable, and is generally the temperature assigned to men's or unisex bags.
It is recommended that you choose a sleeping bag with a temperature rating that is lower than the lowest temperature you expect to encounter on your backpacking trips. This is because you can always open up a bag to cool down when conditions are warmer, but you don't want to be caught out in cold weather with a sleeping bag that is not warm enough.
ISO (International Standards Organization) and EN (European Norm) are the two standardized testing methods used to assign temperature ratings to sleeping bags. These tests produce a rating range for each bag, with the "comfort" and "limit" ratings falling within that range. Bags that do not have an ISO or EN rating are likely to have a brand's own temperature estimate, which may not be as reliable as an independently tested rating.
It is worth noting that temperature ratings are estimates and not exact measurements. Lab testing simulates how a sleeping bag will be used, but it cannot account for all variables, such as differences in clothing, gear, body types, weather conditions, and more. Therefore, it is important to consider other factors in addition to temperature rating when choosing a backpacking sleeping bag, such as the R-value of your sleeping pad, the type of insulation, the weight of the bag, and any additional features that may improve your comfort.
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Insulation type
When choosing a backpacking sleeping bag, the insulation type is an important factor to consider. The two main types of insulation are down and synthetic, each with its own advantages and disadvantages.
Down insulation is made from the natural feathers of ducks or geese and is known for its superior warmth, lightweight, and compressibility. It is often the insulation of choice for serious backpackers as it provides more warmth with less weight and bulk. Down insulation is also long-lasting, retaining consistent warmth for decades if properly cared for. However, down insulation is generally more expensive, and one of its major drawbacks is its performance when wet. Down sleeping bags can lose their insulating ability when soaked, making them unsuitable for damp climates. To mitigate this issue, some manufacturers treat the down with a water-repellent coating or use waterproof liners and stuff sacks to keep the bag dry.
Synthetic insulation, on the other hand, is typically made from polyester and offers a more affordable option. Synthetic insulation continues to insulate even when wet, making it a preferred choice for wetter environments. Synthetic bags use quilted, offset quilted, or shingled constructions to distribute insulation evenly and avoid cold spots. However, synthetic insulation tends to be bulkier and less compressible than down, taking up more space in your pack.
The decision between down and synthetic insulation depends on your budget, the climate you'll be backpacking in, and your preference for weight and packability. Some bags even offer a down-synthetic blend, with synthetic insulation on the bottom for better compression resistance and down on top for better loft. Ultimately, the insulation type you choose will significantly impact your backpacking experience, so it's worth considering your specific needs and priorities.
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Budget
When it comes to budgeting for a backpacking sleeping bag, there are a few key considerations to keep in mind. Firstly, it's important to understand the difference between a backpacking sleeping bag and a camping sleeping bag. Backpacking bags are generally more lightweight, pack down smaller, and are more efficient in providing warmth for their weight. This means that even a budget backpacking bag will likely be more expensive than a camping bag due to the specialised design and materials required.
That being said, there are still ways to find backpacking sleeping bags that fit within your budget. One option is to look for inexpensive gear manufacturers, such as Kelty, which offers the Cosmic Down 20—a budget-friendly down sleeping bag with an ISO Comfort rating of 31 degrees Fahrenheit, suitable for most 3-season conditions. Another option is to consider synthetic insulation instead of down. Synthetic insulation is generally more affordable, and while it may not be as lightweight or durable as down, it can provide comparable warmth and continue to insulate even when wet. For example, the Marmot Trestles Elite Eco offers warmth at a similar price point to the Feathered Friends Swallow UL 20, but with the added benefit of weather resistance.
If you're just starting out with backpacking, it might be a good idea to look for budget-friendly options that will allow you to try out different gear without breaking the bank. Websites like REI often have outlet sections where you can find great deals on last season's stock. Facebook Marketplace, gear swaps, and thrift stores are also excellent places to find used gear at a fraction of the price. You can often find lightly used sleeping bags and other backpacking equipment sold by individuals who may have switched to ultralight gear or no longer need certain items.
When budgeting for a backpacking sleeping bag, it's important to consider the temperature ratings and whether the bag is suitable for the conditions you'll be camping in. A good rule of thumb is to choose a sleeping bag with a temperature rating that is slightly lower than the lowest temperature you expect to encounter. This will ensure you stay warm and comfortable during your trips. Additionally, consider the R-value of your sleeping pad, as this is another critical component of your sleep system that affects your overall comfort and warmth.
Finally, keep in mind that your budget will also depend on the time of year you plan to camp. If you're mainly camping during the warmer summer months, you won't need a heavy-duty winter bag, and a 3-season bag with additional layers for chilly nights may suffice. Quilts can also be a good option for summer camping, but they may not provide the same level of warmth as a sleeping bag, so supplemental warmth may be necessary.
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Additional features
When choosing a backpacking sleeping bag, there are several additional features to consider beyond the sleeping bag's temperature rating, insulation type, and weight.
Firstly, look for a backpacking sleeping bag with a draft tube, a down-filled tube that blocks cool air from entering through the zipper. Many premium bags include a draft tube, but the Swallow and Egret bags are known for their particularly robust draft tubes that effectively lock in warmth. A draft collar around the neck and hood, as well as a fitted cut that eliminates dead space inside the bag, are other warmth-preserving features to look out for.
Secondly, consider the sleeping bag's shape and whether it suits your body type and sleeping habits. Mummy bags, for example, are highly efficient at retaining warmth due to their trimmed-down design, but some hikers may find the space too tight. On the other hand, the Montbell Down Hugger 650 #1 is designed for those with broad shoulders and narrower hips, while the Big Agnes Sidewinder SL 20° is ideal for side sleepers and backpackers who shift positions frequently during sleep.
Thirdly, the length and placement of the zipper are important factors. A long zipper, such as the one found on the Mountain Hardwear Bishop Pass 15, can make it easier to get in and out of the bag. Additionally, a glow-in-the-dark zipper pull can be a convenient feature when answering nature's call in the dark.
Lastly, some sleeping bags offer extra storage options, such as zippered internal pockets for storing small items like a headlamp or phone. Other bags, like the Feathered Friends Swallow, lack these modern touches but make up for them with exceptional warmth and lightweight design.
In conclusion, when choosing a backpacking sleeping bag, consider additional features such as draft tubes and collars, bag shapes, zipper length and placement, and internal storage options to ensure a comfortable and functional sleeping experience in the backcountry.
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Frequently asked questions
A backpacking sleeping bag is a lightweight, compact, and warm bag that is designed to be carried in a backpack. It is different from a camping sleeping bag, which is usually bulkier and heavier.
The key factors to consider are the temperature rating, the type of insulation, the weight, and the sleep system. It is important to choose a bag with a suitable temperature rating for the conditions you will be sleeping in. The type of insulation, such as down or synthetic, will affect the warmth, durability, and price of the bag. The weight of the bag is also important, as a lighter bag will be easier to carry. Finally, the sleep system includes the R-value of the sleeping pad and other variables that affect your comfort.
Down insulation is made from the natural feathers of ducks or geese. It is usually more expensive, lighter, more compressible, and more durable than synthetic insulation. Synthetic insulation is made from man-made materials and is generally more affordable. It continues to insulate when wet, whereas down loses its insulating power if it gets damp.
The temperature rating of a sleeping bag indicates the lowest temperature at which it will keep a person comfortable. It is usually assigned as a comfort or limit rating. Choose a bag with a rating slightly lower than the typical low temperatures you expect on your trips. You can always open up the bag or unzip it if you feel too warm.
Some recommended backpacking sleeping bags include the Western Mountaineering MegaLite, Mountain Hardwear Bishop Pass 15, Kelty Cosmic Down 20, Feathered Friends Swallow UL 20, and Marmot’s synthetic Trestles Elite Eco. The best bag for you will depend on your budget, the temperature rating you require, and your personal preferences for features such as weight, packability, and additional features.
