Miya Pearson
When choosing a sleeping bag from REI, it's important to consider the temperature range you'll be using it in, as well as your own preferences for width and shape. REI offers a variety of sleeping bags, including the Magma mummy bag in Narrow, Standard, and Wide sizes, catering to different body types and preferences. The Magma bag also offers an internal phone pocket, a feature found in most bags. The temperature rating of a sleeping bag is crucial, and it's recommended to select one suitable for the typical nighttime temperatures you'll encounter. Synthetic insulation may be preferable for beginners or those in damp or humid climates, while down insulation is ideal when weight and space are a priority.
| Characteristics | Values |
|---|---|
| Temperature rating | Choose a bag suitable for the typical overnight temperatures you experience when backpacking. |
| Shape | This depends on your height, body type, how you sleep, and whether you prioritise weight and packability. |
| Width | REI offers mummy bags in Narrow, Standard, and Wide. Narrower bags are more efficient at retaining heat and are lighter and more packable. |
| Warmth-to-weight ratio | Choose a bag that balances warmth with weight. |
| Insulation | Down is the best choice when weight and space are important and the bag will be kept dry. Synthetic insulation is better for damp or humid climates and for keeping costs down. |
| Zipper | Look for interlocking pins that allow you to connect and disconnect the left and right sides. |
| Pockets | An internal pocket can be useful for keeping electronics warm and organised. |
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What You'll Learn
Sleeping bag shape and size
When choosing a sleeping bag, it's important to consider its shape and size. This depends on more than just your height and body type—it also comes down to how you sleep and whether you prioritise weight and packability. For example, if you have a larger frame, broad shoulders, or simply prefer extra room, you might want to opt for a wider bag. However, keep in mind that narrower bags retain heat more efficiently and are lighter and more packable than roomier alternatives.
The REI Magma mummy bag, for instance, comes in Narrow, Standard, and Wide options, providing a high degree of customisation. The Nemo Disco 15 bag is another example of a bag that provides tremendous space at the foot, allowing for more enjoyable leg stretching. On the other hand, the Western Mountaineering MegaLite bag has a standard tapered mummy shape with a narrow footbox, which may not be preferred by everyone.
The temperature of the environment you'll be using your sleeping bag in is also a crucial factor in determining its shape and size. If you primarily camp in mild conditions, a 30°F bag should be sufficient for warm-weather summer backpacking. For more versatility, consider a 15°F to 20°F bag, which is great for summer camping at higher elevations or during spring and fall.
Additionally, the clothing you wear while sleeping will impact the warmth of the bag. It's important to check the actual tested temperature ratings of the bag before purchasing, as there is no industry-wide standard for temperature labelling. For example, women's bags often advertise their comfort rating, while men's bags use the lower limit.
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Temperature ratings
The temperature rating of a sleeping bag is an important consideration when choosing a sleeping bag from REI. The temperature ratings of sleeping bags vary, and it is important to select a bag suitable for the temperatures you will encounter. For example, a 30°F bag is ideal for warm-weather summer backpacking, especially below the tree line, whereas a 15°F to 20°F bag is more versatile and can be used for summer camping at higher elevations or in the spring and fall seasons.
REI's Magma mummy bag, for instance, comes in a range of temperature ratings, with the Magma 15 bag named for a temperature that falls between its 21-degree comfort rating and 9-degree lower limit. It is important to note that there is no industry-wide standard for temperature ratings, and it is always a good idea to check the actual tested temperature ratings before purchasing. The comfort rating of a sleeping bag is also subjective and depends on individual preferences and clothing choices.
When choosing a sleeping bag, it is recommended to consider the typical nighttime temperatures of your backpacking locations. It is also important to remember that you can use strategies to extend the temperature range of your sleeping bag, such as using a hot water bottle, a warmer sleeping pad, or sleeping in more clothing. These strategies can help you use your normal bag in slightly colder temperatures without needing to purchase a bag with a lower temperature rating.
Additionally, the width of the sleeping bag can impact its temperature rating. Narrower bags tend to retain heat more efficiently and are lighter and more packable than roomier alternatives. Therefore, if you prioritize warmth, a narrower bag may be a better choice. However, if you have a larger frame, broad shoulders, or prefer extra room, a wider bag may be more comfortable, even if it sacrifices some heat retention.
Finally, the fill power of the sleeping bag can also affect its temperature rating. For example, the REI Magma bag has an 850-fill power, which contributes to its temperature rating and overall warmth. A higher fill power indicates a greater ability to trap body heat and insulate, resulting in a warmer sleeping bag. However, it is important to consider other factors as well, such as the design and materials of the bag, to ensure that it meets your specific needs and preferences.
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Weight and warmth
When choosing a sleeping bag, finding the right balance between warmth and weight is crucial. If you prioritise warmth, opt for a bag with a higher fill power, such as the REI Magma 850-fill-power model, which also offers a range of size options. While this bag may be bulkier than other ultralight models, it provides excellent warmth for its price.
On the other hand, if weight is your priority, consider a bag like the Western Mountaineering MegaLite, which is one of the lightest-weight bags available while still offering superior warmth. The Mountain Hardwear Bishop Pass 15 is another option that strikes a balance between warmth and weight, weighing under 2.5 pounds.
The temperature ratings of sleeping bags are important to consider when selecting one. Choose a bag suitable for the typical overnight temperatures you'll encounter, rather than the coldest possible conditions. For example, a 30°F bag is ideal for warm-weather summer backpacking, while a 15°F to 20°F bag is more versatile and suitable for summer camping at higher elevations or during spring and fall.
Additionally, the width of the sleeping bag can impact its weight and warmth retention capabilities. Narrower bags tend to be lighter, more packable, and better at retaining heat, while wider bags offer more room but may be less efficient at heat retention. Ultimately, the right choice depends on your personal preferences, your body type, and the sleeping conditions you anticipate encountering.
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Cost
When it comes to cost, it's worth considering the trade-off between price and performance. While down sleeping bags offer superior warmth-to-weight ratios, they tend to be more expensive. Synthetic insulation, on the other hand, is a more budget-friendly option, especially for beginners or those who camp in humid climates. Synthetic bags are generally less expensive and can keep costs down, even if they add a bit of weight to your gear.
If you're looking for a budget-friendly option, the Mountain Hardwear Bishop Pass 15 is a great choice. It offers superior warmth without breaking the bank, although it weighs a bit more than some of its pricier competitors. The Nemo sleeping bags, known for their interesting shapes and spacious footboxes, might also be worth considering for their balance of features and affordability.
Ultimately, the cost of a sleeping bag depends on various factors, including the materials used, the temperature rating, and the brand. It's important to strike a balance between your budget and the features you need to stay comfortable during your outdoor adventures. Remember that investing in a good-quality sleeping bag can make a significant difference in your camping experience, so choose according to your priorities and preferences.
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Zippers and pockets
Zippers are a crucial component of sleeping bags, as they allow you to regulate temperature and ventilation. Most sleeping bag zippers have a pair of interlocking pins at one end that enable you to connect and disconnect the left and right sides. These pins are essential for restarting the zipper if it becomes misaligned. However, some models forgo these pins, opting instead to sew the zipper ends directly into the bag. When considering zippers, it's important to be aware of potential issues like snagging, which can lead to misaligned teeth or a dislodged slider. The ability to easily restart the slider at the pins is a feature offered by most bags, but some models, like The North Face Cat's Meow and Therm-a-Rest Hyperion, may pose challenges in this regard.
In addition to the zipper itself, you may also want to consider the presence of pockets. A zippered pocket on the inside of a sleeping bag provides a convenient space to store small items securely. For instance, the REI Magma sleeping bag features an internal phone pocket, allowing you to keep your electronics organised and warm. Pockets can be a valuable addition to your sleeping bag, enhancing its functionality and helping you stay organised during your outdoor adventures.
When deciding between different sleeping bag options, it's important to consider the placement and functionality of zippers and pockets. Zippers that run along the sides or bottom of the bag can provide additional ventilation options, allowing you to customise your temperature and comfort level. Additionally, look for zippers that are easy to operate, with smooth sliding action and durable construction. Consider your personal preferences regarding the number and placement of pockets. Some bags may offer multiple pockets for various purposes, such as a chest pocket for valuables and a larger pocket for a water bottle or snacks.
Ultimately, the decision comes down to your specific needs and preferences. If you tend to sleep warm or frequently camp in warmer climates, you might prioritise zipper placement and ventilation options. On the other hand, if you're a cold sleeper or often camp in colder environments, you may focus more on the insulating capabilities of the bag, ensuring that the zipper doesn't create unnecessary drafts. It's worth noting that some bags offer draft tubes or zipper garages that help prevent heat loss through the zipper, which can be beneficial in colder conditions.
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Frequently asked questions
Choosing a sleeping bag shape depends on your height and body type, as well as your sleeping habits and whether you prioritise weight and packability.
Choose a bag suitable for the typical overnight temperatures you encounter while backpacking, not the coldest possible temperatures. Check the actual tested temperature ratings before buying.
Down is the best choice when weight and space are important, especially if you can keep your sleeping bag dry. Synthetic insulation is often more affordable and can be a good choice for beginners or for use in damp or humid climates.
Width is a matter of personal preference, but it's especially important if you have a larger frame or broad shoulders, or if you prefer extra room. Narrower bags retain heat more efficiently and are lighter and more packable.
Some sleeping bags have internal pockets to keep electronics and other items organised and warm. Sleeping bag zippers usually have interlocking pins to prevent misalignment, but some models sew the zippers directly into the bags, which can cause problems if the zipper gets snagged.
