Ashwin Lewis
Mummy sleeping bags are a great option for hikers looking to save weight without compromising comfort. They are designed to keep you warm and comfortable after a long day of hiking, climbing, biking, or other outdoor pursuits. Mummy sleeping bags are also versatile, with some bags featuring a two-way zipper that allows you to open the footbox or completely unzip and lay the bag flat. Some mummy bags can even be zipped together with another bag, allowing you to cuddle and steal warmth from your camping partner. However, zipping two bags together can be tricky, as the zippers, shapes, and sizes of the bags may not always match.
| Characteristics | Values |
|---|---|
| Zipper | Two-way zipper, wrap-around zipper |
| Zipper Functionality | Can be unzipped and laid flat, can unzip the footbox only |
| Zipper Compatibility | Mummy bags can be zipped together, but they must be one right-zip and one left-zip, and of the same zipper manufacturer |
| Zipper Guard | Prevents snagging on the draft tube or sleeping bag material |
| Zipper Snags | Zippers can snag, but this can be avoided by keeping your finger in the channel behind the zipper while zipping and unzipping |
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What You'll Learn
Zipping two mummy sleeping bags together
Mummy sleeping bags can be unzipped and even zipped together, allowing two single bags to be converted into a double. This is useful for couples who want to cuddle up and keep each other warm. However, there are a few things to keep in mind when attempting to zip two mummy sleeping bags together. Firstly, the bags need to have zippers that are compatible. This means that the bags should have zippers that are of the same design and manufactured by the same company. In addition, one bag should have a right-zip, while the other should have a left-zip.
Secondly, the bags should be of different lengths. If both bags are the same length, the shorter bag will have less space for their head, or the taller person will have cold feet. To avoid this, it is recommended to get a regular-sized bag and pair it with a tall-sized bag.
Thirdly, the bags should be flipped so that one zipper is on the top and the other is on the bottom, allowing them to zip together properly. However, this may cause the head area of the mummy bag to cover your face, which is not ideal.
Lastly, it is important to remember that zipped-together bags will provide less heat than separate bags due to gaps and movement that can push out warm air. Despite these challenges, it is possible to zip two mummy sleeping bags together with careful planning and the right combination of bags.
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Zipper type and manufacturer compatibility
Some manufacturers, like REI, guarantee that their mummy sleeping bags for men and women will be compatible for zipping together. This means that if you own an REI mummy sleeping bag, you can be confident that it will be compatible with another REI bag. However, mixing and matching bags from different manufacturers may not always yield successful results.
The Zpacks Mummy Sleeping Bag, for example, features a full-length two-way side zipper. This zipper allows the bag to be used in multiple ways, such as opening it completely to use it like a quilt or unzipping just the footbox to ventilate your feet. While the Zpacks bag offers versatility, it is unclear if it can be zipped together with mummy bags from other manufacturers.
When considering zipper compatibility, it's worth noting that some mummy sleeping bags may have specific zipper types, such as a "#8 YKK coil/tooth" zipper. Before attempting to zip two mummy bags together, it is advisable to check the zipper type and manufacturer to ensure compatibility. Trying to force incompatible zippers together can result in damage to the bags or, at the very least, a frustrating experience.
Additionally, the location of the zipper on the mummy bag is crucial for successful zipping. One bag should have a zipper on the top, while the other should have a zipper on the bottom. If both zippers are on the top or bottom, flipping one bag over may not be ideal, as the head part of the mummy bag will cover your face. Therefore, it is important to pay attention to the zipper location when purchasing a mummy sleeping bag if you plan to zip it together with another bag.
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Zipper location and bag shape
The Zpacks Mummy Sleeping Bag is a traditional mummy sleeping bag with a hood and a full-length two-way side zipper. The zipper wraps around the footbox, allowing you to unzip and kick your feet out, or open the bag completely and use it like a quilt. The bag also features a zipper guard to prevent snagging and a snap at the top of the zipper to keep it securely closed.
The bag is designed to maintain its full width at the neck and shoulders, allowing users to hang their arms out or reach out without feeling trapped. An elastic cord can be tightened around the neck to keep out drafts, and the shock cord at the neck and hood can be adjusted independently. The bag comes with a roll-top dry bag for packing, which can be compressed by squishing the contents and rolling the top down.
The Zpacks Mummy Sleeping Bag is available in two temperature ratings, three lengths, and two widths, with a total of 12 different combinations (48 if you count the four different colors). The bag is constructed with responsibly sourced and 'Responsible Down Standard' certified down, which stays dry 90% longer than untreated down. Each compartment is overstuffed with 30% more 900 Fill Power Premium Goose Down than is necessary for maximum loft, accounting for any future down compression.
When considering zipping mummy sleeping bags together, it is important to note that the bags must have zippers that are compatible. They should be of the same zipper manufacturer, with one bag having a right-zip and the other a left-zip. Additionally, one bag needs to be on top and the other on the bottom for proper zipping.
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Zipper snagging and safety
Zipper snagging is a common issue with mummy sleeping bags. The Zpacks Mummy Sleeping Bag, for example, has a zipper that works fine but is prone to snagging, especially when the user is inside the bag. This can be dangerous given the delicate shell of the bag. However, this snagging issue can be avoided by keeping your finger in the channel behind the zipper while zipping and unzipping, and by moving slowly.
The Zpacks Mummy Sleeping Bag features a zipper guard to prevent snagging on the draft tube or sleeping bag material. A snap at the top of the zipper also keeps it securely closed. The bag also has a two-way zipper that allows you to open the footbox only, providing ventilation and the option to kick your feet out if you get too hot.
The Zpacks Mummy Sleeping Bag is a traditional mummy bag with a wrap-around zipper that can be used as a quilt or a standard bag. It is constructed with top-shelf, 900-fill power down that is treated with DWR to resist condensation and body moisture. The bag is designed to keep you warm and comfortable after a long day of outdoor activities.
To prevent zipper snagging in mummy sleeping bags, it is important to carefully follow the manufacturer's instructions for zipping and unzipping. Moving slowly and ensuring that the zipper is aligned properly can help avoid snagging. Additionally, keeping the sleeping bag clean and free of debris can reduce the risk of snagging. Regular maintenance and inspection of the zipper can also help identify any potential issues and ensure smooth operation.
In conclusion, zipper snagging is a common issue with mummy sleeping bags, but it can be mitigated with careful use and maintenance. The Zpacks Mummy Sleeping Bag, with its zipper guard and snap closure, offers a solution to prevent snagging and ensure a secure and comfortable experience for users.
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Weight and warmth
Mummy sleeping bags are more lightweight and packable, making them a good choice for backpackers and hikers who need to save space. They have a tapered form that is wider at the shoulders and narrower at the feet, resembling a mummy’s shape. The Zpacks Mummy Sleeping Bag, for example, is an ultralight mummy sleeping bag with a wrap-around zipper that can be used as a quilt or a traditional bag. The shell of the bag weighs 7.6 oz / 217 g, and the bag itself weighs 23.2 oz / 659 g, making it one of the lightest mummy options available.
The reduced internal volume and the presence of a hood in mummy bags significantly reduce heat loss. The snug fit of a mummy bag is its most significant advantage in cold weather. By closely contouring to your body, it traps body heat efficiently, making it an excellent choice for winter camping and sleeping in colder climates. Mummy bags are therefore better suited for colder conditions where warmth and insulation are priorities.
On the other hand, rectangular sleeping bags are generally more spacious and comfortable. Their shape allows for more freedom of movement, making them ideal for people who move a lot in their sleep or prefer to sleep in different positions. They are also often less expensive than mummy sleeping bags, making them a more budget-friendly option. Rectangular bags are more suitable for warmer climates or indoor use where the temperature is not a concern.
However, the spacious design of rectangular bags means there is more internal space that your body must heat, making them less efficient at retaining warmth compared to mummy bags. Rectangular bags are also heavier and bulkier than mummy bags due to the larger amount of material and insulation used. This makes them less ideal for situations where pack weight and space are critical factors.
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Frequently asked questions
Yes, mummy sleeping bags can be unzipped. The Zpacks Mummy Sleeping Bag, for example, has a full-length 2-way side zipper that can be unzipped to kick your feet out or opened completely to be used as a quilt.
Yes, you can zip two mummy sleeping bags together. However, for this to work, the bags must have zippers that are similar in design, with one bag being a right zip and the other a left zip. Additionally, the bags should be from the same manufacturer.
The Zpacks Mummy Sleeping Bag is a popular option that can be unzipped and used as a quilt. It comes in two temperature ratings, three lengths, and two widths, offering a total of 12 different combinations.
