Miya Pearson
Compressing a mummy sleeping bag is a handy skill to have, especially if you're backpacking or camping. It saves space and makes your outdoor adventure more manageable. To compress a mummy sleeping bag, you'll need to remove air from the bag, use a compression sack, and pack it smartly in your backpack. The process involves laying the bag flat, ensuring it's zipped up, and then rolling or folding it tightly from the bottom towards the top to expel air. The unique shape of mummy bags requires a specific approach to maximise compression without damaging the bag. Additionally, choosing the right compression sack and knowing how to pack your bag efficiently are crucial steps in the process.
How to Compress a Mummy Sleeping Bag
| Characteristics | Values |
|---|---|
| Prepare the Sleeping Bag | Lay the bag flat, zip it up, and open any vents to allow air to escape. |
| Remove Air | Start from the foot end and roll or fold the bag tightly towards the top, pressing down to expel air. |
| Use a Compression Sack | Place the rolled bag inside a compression sack designed for mummy bags. |
| Tighten Evenly | Adjust the sack's straps evenly to prevent lumps and protect the insulation. |
| Storage | Avoid constant compression, which can damage the insulation. Store loosely in a cotton pillowcase or hang it in a closet. |
| Waterproofing | Use a waterproof compression sack or a pack cover with a trash compactor bag inside to keep the sleeping bag dry. |
| Alternative Methods | Some people prefer to stuff the bag into the compression sack or just into their backpack without a sack. |
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What You'll Learn
Prepare the sleeping bag
To prepare a mummy sleeping bag for compression, start by laying the bag flat on a surface and ensuring that it is fully zipped up. If your bag has any vents, open them to allow air to escape more easily.
Next, you'll want to fold the bag. Fold the bag neatly in half lengthwise, making sure the top, bottom, and sides line up so that the bag is in proper alignment. Some sources suggest that you can skip this step and go straight to rolling up the bag, but folding it first will help to minimise the volume of the bag.
Now, you're ready to start rolling. Begin at the bottom of the bag and roll it up towards the top. Use a small and tight roll to release the air within the folds of the bag, which will help to compress it. Mummy bags often have more insulation in the hood and shoulder areas, which can trap air, so pay particular attention to compressing these areas evenly.
Once the bag is rolled up tightly, you can move on to the next step of placing it inside a compression sack.
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Remove air
To compress a mummy sleeping bag, removing air is a crucial step. This can be done by first ensuring the bag is laid out flat and zipped up. Smooth out the bag to get rid of any air pockets and ensure the hood is not bunched up, as this will affect how tightly the bag can be rolled.
The next step is to fold the bag neatly in half lengthwise, making sure the top, bottom, and sides line up for proper alignment. Then, start rolling from the narrower foot end towards the top. It is important to use a small and tight roll to effectively release the air within the folds of the bag. This might require rolling the bag more than once to ensure all air is pushed out.
As you roll, periodically press down to expel air. Mummy bags often have more insulation in the hood and shoulder areas, so it is important to ensure these sections are compressed evenly to prevent air from being trapped. Once fully rolled, the bag can be secured using the built-in straps or placed into a compression sack designed for mummy bags.
The compression sack should be lightweight and durable, further reducing the packed size of the sleeping bag. It is important to tighten the compression sack's straps with equal tension to maintain the bag's shape and ensure even compression, preventing any damage to the insulation.
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Use a compression sack
Using a compression sack is a great way to save space when packing a mummy sleeping bag. Compression sacks are designed to withstand the rigors of backpacking and can further reduce the packed size of your sleeping bag. They are slightly heavier than a regular stuff sack, but the minimal extra weight is worth it for the reduction in volume and the protection they offer against tears.
Before placing your sleeping bag inside a compression sack, it's important to prepare it. Lay the bag flat, ensuring it is fully zipped, and open any vents to allow air to escape more easily. Starting from the bottom, gently roll or fold the bag towards the top, pressing down to expel air as you go. For a mummy sleeping bag, it is best to begin at the foot end to maximize air removal.
Once the sleeping bag is rolled or folded tightly, you can place it inside the compression sack. These sacks have straps that, when tightened, further compress the volume of the sleeping bag. It is important to adjust these straps evenly to ensure the sleeping bag compresses uniformly. This will prevent lumps or uneven pressure points that could damage the insulation over time. Mummy sleeping bags often have more insulation in the hood and shoulder areas, so it is important to ensure these areas are compressed evenly.
Specialized compression sacks designed for mummy sleeping bags are often shaped to fit the contoured design of the bag, helping to achieve a tighter pack. They can be purchased cheaply and are easier to pack than a regular bag.
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Pack smart
The first step to packing smart is to prepare your mummy sleeping bag for compression. Lay the bag flat, ensuring it is fully zipped, and smooth it out from the hood down to the foot end. If your bag has vents, open them to allow air to escape more easily.
Next, you need to decide whether to roll or stuff your bag. Rolling can cause repeated stress on the same parts of the bag, leading to lumps in the stuffing or tears in the fabric, and it takes longer. However, it is a good option if you want to avoid buying a stuff sack. When rolling, start at the foot end and roll tightly towards the top, pressing down to expel air as you go.
If you decide to stuff your bag, you can use a stuff sack, a compression sack, or simply stuff it into your backpack. If using a stuff sack, start with the foot end and pack tightly to avoid running out of space before the bag is fully inside. If using a compression sack, place the rolled or folded bag inside and use the cinch straps to compress it further.
To save money and space, some people choose to stuff their sleeping bag directly into their backpack. This method can be effective if you have a lot of gear to pack, as the bag can fill the bottom of the pack and compress further depending on how full the pack is. However, this method may not be suitable if you need to protect your bag from water, as it will be more vulnerable to the elements when carried outside a protective sack.
Finally, when packing your bag, it is recommended to place the sleeping bag at the bottom of your backpack to create a stable base for other gear.
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Protect your bag from water
If you're backpacking in wet conditions, it's important to take steps to keep your sleeping bag dry. Waterproofing your bag is one option, but it's important to note that this can affect the bag's breathability. You can use a waterproofing spray that is suitable for the fabric of your sleeping bag, or you can try a hydrophobic coating like DWR (Durable Water Repellent), which aids in water runoff without impacting breathability.
Another option is to use a liner inside your sleeping bag. A vapor barrier liner will protect the bag from condensation and keep you warmer. If you're using a down bag, a liner can also help manage perspiration, as down bags are more susceptible to clumping and losing insulation when they get wet. You can also use a trash compactor bag or a regular garbage bag as a liner, or place it inside your sleeping bag container for extra protection.
If you're camping in an area with morning dew or condensation, consider using a bivy sack or bag cover to protect your sleeping bag from getting damp. A bivy sack is a lightweight and weather-resistant option that can replace a tent for long-distance backpackers. Additionally, when packing your bag, be mindful of where you place it. Avoid strapping it to the bottom of your backpack, as it may come into contact with the wet ground. If you must attach it to the outside of your pack, try to centre it and secure it tightly to prevent it from falling out.
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Frequently asked questions
Lay the bag flat and ensure it is fully zipped. Open any vents to allow air to escape.
Starting from the foot end, roll or fold the bag tightly towards the top, pressing down to expel air as you go.
A compression sack is a lightweight, durable bag with straps that further reduce the volume of the sleeping bag when tightened. It protects the bag from tears and is worth the minimal extra weight.
Place the rolled-up sleeping bag inside the compression sack and tighten the straps evenly. This will prevent lumps or uneven pressure points that could damage the insulation over time.
Yes, some people simply stuff the bag into their backpack and let it fill the empty spaces. However, this method does not protect the bag from tears or water damage.
