Evie Summers
The mummy sleeping bag is the most popular shape on the market. It has a slim cut and a contoured hood, which can be cinched tight for extra warmth. Mummy sleeping bags are designed to be snug, with a fit that tapers towards the feet. This makes them the warmest option, as there is less air to heat. They are also lightweight and pack easily, making them ideal for backpacking. However, the mummy bag's snug fit means there is less room to move around. For those who value comfort over warmth, a rectangular bag may be a better option.
| Characteristics | Values |
|---|---|
| Shape | Mummy |
| Fit | Snug |
| Length | 6 ft. (regular) and 6 ft. 6 in. (long) for men; 5 ft. 4 in. (regular) and 5 ft. 10 in. (long) for women |
| Shoulder girth | 60–64 inches for men; 56–60 inches for women |
| Hip girth | N/A |
| Hood | Yes |
| Zipper | Full-length 2-way side zipper |
| Draft tube | Yes |
| Zipper guard | Yes |
| Dry bag | Yes |
| Pillow | Medium |
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What You'll Learn
- A normal-length mummy bag is usually for people up to 6 feet tall
- The bag should be snug, but not too tight or too loose
- Mummy bags are the warmest option, but they can be restrictive
- Mummy bags are lightweight and pack easily, making them ideal for backpacking
- Mummy bags have a hood and a full-length 2-way side zipper
A normal-length mummy bag is usually for people up to 6 feet tall
When it comes to sleeping bags, the better the fit, the warmer it will be. A sleeping bag that fits too tightly or too loosely can cost you warmth. A properly fitting sleeping bag will wrap around you snugly, minimising the amount of air space around your body. This reduces the amount of air you need to heat up and keep warm, and limits the amount of warmth that escapes when you shift or roll over.
Mummy sleeping bags are the most popular shape and have a slim cut that tapers toward the feet, making them the warmest option. They are lightweight and pack easily, making them ideal for backpacking or technical adventures that require packability and warmth. Mummy bags are more restrictive than other shapes, and they are usually designed for people up to 6 feet tall.
The length of a sleeping bag is the most important size dimension to consider when choosing one. Men's sleeping bags typically come in two standard lengths: regular (fitting people up to 6 feet tall) and long (fitting up to 6 feet 6 inches). A 6-foot sleeping bag will actually measure roughly 6 feet 8 inches long, giving a 6-foot-tall person the extra room needed for a correct fit. This is because, when we lay flat, our spines decompress, our feet fall forward, and our bodies spread out.
The next most important size consideration is the shoulder girth, or the circumference of the sleeping bag across the shoulders. Most men's sleeping bags have a shoulder girth of between 60 and 64 inches, although some models can be as narrow as 58 inches or as wide as 66 inches. Women's sleeping bags are usually slightly narrower across the shoulders, with a shoulder girth ranging from 56 to 60 inches.
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The bag should be snug, but not too tight or too loose
The mummy sleeping bag is the most popular bag shape. It has a snug fit that narrows towards the feet, making it the warmest option. This is because the mummy bag design minimises the amount of air between you and the insulating wall of the bag, meaning there is less air to heat. This also makes it lightweight and easy to pack, ideal for backpacking.
The bag should fit your body as snugly as possible, but not so tightly that it is uncomfortable to sleep in. This is because the more air space there is around your body, the more air you will need to heat up and keep warm. However, a bag that is too tight can make it difficult to roll over and move around, which can be a problem for restless sleepers.
The length of the bag is the most important factor when it comes to fitting a sleeping bag. A 6-foot sleeping bag will actually measure roughly 6-foot 8-inches long, giving a 6-foot-tall person the room they need. This is because when we lie flat, our spines decompress, our feet fall forward, and our bodies spread out. Therefore, sleeping bag designers add a few extra inches to the length to compensate for this. The goal is to minimise excess space to keep the bag warm and save weight.
The next most important factor is the shoulder girth, or the circumference of the bag across the shoulders. Most men’s sleeping bags have a shoulder girth of between 60 and 64 inches, although some can be as narrow as 58 inches or as wide as 66 inches. For most men of standard build, a 60-inch shoulder girth will feel snug, while a 64-inch bag will feel roomy. Women’s sleeping bags are usually slightly narrower across the shoulders, with a shoulder girth of between 56 and 60 inches.
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Mummy bags are the warmest option, but they can be restrictive
Mummy bags are the most popular shape for sleeping bags. They are designed with a slim cut and a contoured hood that can be cinched tight for added warmth. The hood of a sleeping bag is an important feature as it traps heat that would otherwise escape from your head. The snug fit of a mummy bag tapers towards the feet, making it the warmest option as it minimises the amount of air between you and the insulating wall of the bag, meaning there is less air to heat. Mummy bags are also lightweight and easy to pack, making them ideal for backpacking or technical adventures that require packability and warmth.
However, the downside of mummy bags is that they can be restrictive due to their tapered shape. If you prioritise comfort over warmth-to-weight efficiency, you may prefer a rectangular bag, which provides more freedom of movement. Rectangular bags are popular among warm-weather car campers who don't need to worry about packing efficiency or retaining as much body heat.
It's important to consider your tolerance for feeling confined when choosing a sleeping bag. While a tighter fit will keep you warmer, roomier bags allow for more comfortable movement and can help mitigate feelings of claustrophobia. Additionally, the length of your sleeping bag is crucial. A bag that is too long will create excess space, requiring more energy to heat, while a bag that is too short may feel restrictive. Sleeping bags are typically available in regular and long sizes, with regular fitting people up to 6 feet tall and long fitting those up to 6 feet 6 inches.
To address the issue of warmth and restrictiveness, some companies offer a hybrid design that falls between the mummy and rectangular shapes. These semi-rectangular or "modified mummy" bags provide a wider shoulder than a mummy bag and a narrower foot than a rectangular bag. They offer a compromise between warmth and roominess, making them suitable for fair-weather trips and shorter backpacking adventures. Ultimately, the decision between a mummy bag and other options depends on your specific needs for warmth, comfort, and packability.
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Mummy bags are lightweight and pack easily, making them ideal for backpacking
Mummy sleeping bags are designed to be lightweight and easy to pack, making them ideal for backpacking. Their sleek shape and snug fit help to reduce weight, with a slim cut that tapers towards the feet. This efficient design means they take up less space in your backpack, leaving more room for other essential items.
The mummy bag's lightweight and compact nature is further enhanced by its insulation. Down insulation is a popular choice for mummy bags as it is lighter and packs down very small. While down loses its warmth when wet, it is ideal for dry areas. Synthetic insulation, on the other hand, is bulkier and heavier but provides warmth even when wet.
The mummy bag's shape also contributes to its warmth. The snug fit minimises excess space, reducing the amount of air that needs to be heated. This efficient use of space is especially beneficial in cold weather, as it helps retain body heat. Additionally, the mummy bag's hood further enhances warmth by trapping heat around the head.
Mummy bags are designed with a full-length, two-way zipper that allows for ventilation. The zipper can be partially opened to let your feet out if you get too warm, or fully unwrapped to lay flat like a blanket. This versatility is advantageous in varying weather conditions.
The mummy bag's lightweight and packable design, combined with its warmth and ventilation features, make it a popular choice for backpacking and technical adventures. Its compact size leaves more room in your backpack, while its warmth and versatility ensure a comfortable night's sleep in varying weather conditions.
When choosing a mummy bag for backpacking, it is essential to consider the temperature rating, sleep system, insulation type, and weight to ensure a comfortable and practical experience.
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Mummy bags have a hood and a full-length 2-way side zipper
Mummy sleeping bags are the most popular option, owing to their warmth and lightweight design. They are designed with a slim cut and a contoured hood that can be cinched tight for added warmth. The hood of a sleeping bag is an important feature, as it traps heat that would otherwise escape from your head. Mummy bags also have a snug fit, which means there is less air to heat, making them ideal for backpacking or technical adventures that require packability and warmth.
The Zpacks Mummy Sleeping Bag is an excellent example of a mummy bag with a hood and a full-length 2-way side zipper. It is designed to keep you warm and comfortable in the backcountry, with a water-resistant 900 fill power goose down that stays dry 90% longer than untreated down. The bag features a full-length 2-way side zipper with an integrated draft tube and zipper guard to prevent snagging and keep out drafts. The zipper wraps around the footbox, allowing you to open the bag flat or just unzip the bottom to let your feet out if you get too hot.
The Zpacks Mummy Bag also maintains its full width at the neck and shoulders, allowing you to hang your arms out or reach out without feeling restricted. An elastic cord can be cinched tight around your neck and hood to keep out drafts and snug the hood around your face. This bag is designed to provide a comfortable and versatile option for outdoor adventures.
It is important to note that mummy bags can feel restrictive due to their tapered design, and they may not suit those who prefer more room to move around. The trade-off between warmth and comfort is an important consideration when choosing a sleeping bag. While a snug fit maximises warmth, a roomier bag may provide a better night's sleep, especially for restless sleepers or those who feel claustrophobic in tight spaces.
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Frequently asked questions
A mummy sleeping bag is a bag with a slim cut and a contoured hood that can be cinched for added warmth. It has a snug fit that tapers towards the feet, making it the warmest option.
The three important size dimensions to consider are length, shoulder girth, and hip girth. Length is the most important, followed by shoulder girth and then hip girth.
Mummy sleeping bags come in different lengths, including short (up to 5 feet 6 inches), regular (up to 6 feet), and long (up to 6 feet 6 inches). Choose a bag that is slightly longer than your height to allow for a correct fit when your spine decompresses and your body spreads out.
Shoulder girth refers to the circumference of the sleeping bag across the shoulders. It is important because it affects the roominess of the bag. Most men's sleeping bags have a shoulder girth between 60 and 64 inches, while women's sleeping bags are usually narrower, ranging from 56 to 60 inches.
A mummy sleeping bag should fit snugly to maximize warmth. However, it should not be too tight or uncomfortable. A bag that is too loose will also result in a loss of warmth.
