Ashwin Lewis
When choosing a backpacking sleeping bag, it's important to consider the temperature rating, insulation type, bag shape, and extra features. Backpackers should look for a bag with a good warmth-to-weight ratio, as a cold backpacker won't get a good night's sleep. It's also essential to select a bag with a temperature rating lower than the lowest expected temperature. Sleeping bags with down insulation are typically lighter, warmer, and more compressible than those with synthetic insulation. Mummy bags are popular for backpacking as they are snug and lightweight, but rectangular bags offer more room to move. Additional features like stash pockets, pad compatibility, and adjustable ventilation can also enhance the sleeping bag's functionality and comfort.
| Characteristics | Values |
|---|---|
| Temperature Rating | Choose a bag with a temperature rating that is 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 is lighter, warmer, and compressible, while synthetic is fine for car camping. |
| Weight | The quality of insulation and the cut of the bag are important factors. |
| Shape | Mummy bags are snug and boost warmth and cut weight, while rectangular bags allow more room for legs and arms. |
| Size | Choose a bag that fits your body type. Some bags are cut wider for those who sleep hot. |
| Extra Features | Stash pockets, pad compatibility, zipper features, hoods, stuff sacks, etc. |
| Price | Down bags tend to be more expensive. |
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What You'll Learn
Temperature ratings
When buying a backpacking sleeping bag, one of the most important factors to consider is its temperature rating. This is because a sleeping bag's temperature rating indicates the lowest temperature at which the bag will keep you warm. As such, it is important to choose a bag with a temperature rating that is lower than the lowest temperature you expect to encounter on your trips. For example, if you expect to encounter temperatures of 30°F, you should consider buying a bag with a temperature rating of 20°F.
It is worth noting that temperature ratings are based on an "average sleeper". This means that a wide range of other factors will affect how warm you feel when using the bag outdoors. These factors include the R-value of your sleeping pad, what you wear to sleep, humidity and wind, and your metabolism. Therefore, it is important to consider your own body and whether you tend to get cold easily or run warm. Additionally, it is worth noting that most bags sleep about 20 °F colder than their rating. So, if you are unsure about which temperature rating to choose, it is generally wiser to choose a bag with a lower temperature rating, as you can always open up the bag or remove layers if you get too warm.
There are a few different temperature rating standards for sleeping bags. An ISO or EN temperature rating indicates that you can reliably compare any two backpacking sleeping bags. These standardized tests mean you can truly compare temperature ratings between brands. ISO and EN ratings are comparable, with EN being the old standard and ISO being the new standard, which improves consistency across labs. With ISO/EN testing, a bag is assigned two temperature ratings: a comfort rating and a limit rating.
When considering the temperature rating of a backpacking sleeping bag, it is also important to think about the type of insulation the bag uses. Down insulation tends to be lighter, warmer, and more compressible than synthetic insulation, making it a better option for backpacking. However, synthetic insulation is generally cheaper and dries faster than down. Additionally, the fill power of the insulation will affect the warmth and compressibility of the bag, with higher fill powers being warmer and more compressible.
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Insulation type
When it comes to insulation type, you have two options: down or synthetic. Down insulation is made from the soft feathers found beneath the tougher exterior feathers of ducks and geese. It is a popular choice for sleeping bags because of its excellent warmth-to-weight ratio and its ability to compress into a small size. However, down insulation may not be suitable for extremely wet conditions as it tends to clump together when wet, reducing its insulating properties. Additionally, down sleeping bags are often more expensive.
Synthetic insulation, on the other hand, is made from man-made materials such as polyester or nylon. Synthetic sleeping bags are generally more affordable and are better at retaining warmth when wet, making them a good choice for wet and humid conditions. They are also easier to care for and can be washed in a standard washing machine. However, synthetic insulation tends to be bulkier and heavier than down, which is an important consideration for backpacking where weight and pack size are crucial factors.
It is worth noting that some sleeping bags combine both down and synthetic insulation to optimise warmth, weight, and cost. Additionally, if you are concerned about animal welfare, look for sleeping bags labelled with RDS (Responsible Down Standard) or TDS (global Traceable Down Standard), which indicate that the manufacturers have taken steps to monitor the treatment of ducks and geese providing the down.
When choosing between down and synthetic insulation, consider the climate and conditions you will be using the sleeping bag in, as well as your budget and your tolerance for bulk and weight while backpacking. Remember that a good night's sleep is essential for enjoying your backpacking trip, so investing in a high-quality sleeping bag that suits your needs is worth it.
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Bag shape
When choosing a backpacking sleeping bag, it is important to consider the bag shape. The bag shape will determine the warmth-to-weight ratio, weight, and bulkiness of the bag.
Sleeping bags come in three basic shapes: rectangular, mummy, and sleeping quilts. Rectangular sleeping bags are commonly used for camping as they allow plenty of room for the legs and arms to stretch out. Some rectangular bags can be completely unzipped and used like a comforter. Mummy bags are designed to boost warmth and cut weight by providing a snug fit. With a mummy bag, you roll over with the bag rather than inside it. Mummy bags are a good option for backpacking because they are less bulky and weigh less. Sleeping quilts are a minimalist option that is popular among ultralight backpackers and thru-hikers. They are characterized by an open back (no zipper) and an emphasis on weight savings. Quilts feature enclosed or cinchable footboxes and connect to your sleeping pad via included straps. However, the biggest concern with quilts is the lack of insulation at the back.
When choosing a bag shape, it is important to consider the temperature rating of the bag. A bag with a lower temperature rating will be warmer but may be bulkier and heavier. The temperature rating of a sleeping bag is based on an average sleeper and allows for easy comparison between bags. It is also important to consider the R-value of your sleeping pad, which will affect the overall warmth of your sleep system.
Other features to consider when choosing a bag shape include the type of insulation, the zipper style, and the presence of a hood or stash pocket. Down insulation is typically warmer and more compressible than synthetic insulation but may be more expensive. A bag with multiple zipper sliders will allow for easy adjustment of ventilation. A snug-fitting hood can also make a bag warmer, but it may be bulkier. Some bags also include stash pockets for small items like a watch or lip balm.
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Extra features
When buying a backpacking sleeping bag, it is important to consider the extra features that can make your bag work best for you. Here are some key extra features to look out for:
Adjustment features
Some sleeping bags offer adjustable features such as a sleeping pad attachment system or a built-in pillow pocket, allowing you to customise your comfort level.
Stash pockets
Small stash pockets located near the chest area of the bag can be useful for keeping small items like a watch, electronics, or lip balm close at hand. This feature can be especially handy if you need to access certain items quickly or want to keep them warm.
Pad compatibility
Consider the compatibility of your sleeping bag with a sleeping pad, which can provide extra insulation from the ground. Look for bags that have a higher R-value, indicating better insulation. Eliminating drafts is crucial, so ensure your sleeping bag has features to prevent heat escape, such as a draft collar and hood.
Zipper features
Anti-snag zipper features are important to prevent wear and tear on the fabric of your bag. Look for bags with a zipper guard or a cover to protect the zipper. Additionally, multiple zipper sliders can make it easier to adjust ventilation, and left or right zip options can be useful for couples who want to zip two bags together.
Stuff sack and storage sack
Many bags come with a stuff sack to compress your bag for easy packing. However, leaving the bag compressed for long periods can affect its ability to insulate, so consider a bag that also includes a larger storage sack made of mesh or cotton.
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Weight
Insulation type plays a significant role in the weight of a sleeping bag. Down insulation is widely recognised as the lightest insulator, making it the preferred choice for lightweight bags. It is also highly compressible, allowing it to pack down to a smaller size. However, down insulation is typically more expensive. Synthetic insulation, on the other hand, is a more affordable option, but it tends to add a little extra weight and takes up more space when packed. Synthetic insulation has the advantage of performing better when wet, even outperforming modern hydrophobic down bags in this regard.
The fill weight, or the amount of insulation in the bag, also contributes to its overall weight. Bags with higher fill weights tend to provide more warmth but at the cost of increased weight. To achieve a balance between warmth and weight, look for advanced synthetic insulations or high-fill-power downs, as they offer superior warmth-to-weight ratios.
The shape of a sleeping bag can also significantly impact its weight. Mummy bags, for instance, are designed to taper towards the feet, reducing the amount of fabric and fill needed, resulting in a lighter bag. However, this design may compromise comfort, particularly for those who prefer more room to move around. Ultralight bags often feature heavily tapered designs, so consider your backpacking style and sleeping preferences before sacrificing comfort for weight reduction.
When comparing sleeping bags based on weight, it is essential to compare bags with the same temperature rating, as bags designed for colder temperatures will generally be heavier due to the increased insulation required. Additionally, pay attention to the "compressed volume" specifications to understand the packed size of the bag, as a more compact bag will leave more room in your pack for other gear.
Lastly, remember that the weight of your sleeping bag is just one part of your overall backpacking setup. Consider the weight of your tent, sleeping pad, backpack, and other gear, as well as the potential multiplier effects of having a lighter load. Striking a balance between weight and warmth is crucial, as a good night's sleep is essential for an enjoyable backpacking trip.
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Frequently asked questions
The most important factors to consider are the temperature rating, type of insulation, weight, and bag shape.
For backpacking, you'll want a sleeping bag that is light, warm, and compressible. Down insulation is generally best for these purposes. However, synthetic insulation is a good option for those who are concerned about animal welfare.
Backpacking bags are usually more lightweight and compact than camping bags. Mummy-style bags are popular for backpacking as they are snug and help retain warmth. However, rectangular bags are also suitable for backpacking if you prioritise having more space to move around.
