Backpackers: Where To Stow Your Sleeping Bag?

why carry sleeping bag inside or outside backpack

When going on a hike, it is important to consider how to pack your sleeping bag. Some hikers prefer to keep their sleeping bags inside their backpacks, while others strap them to the outside. Those who prefer to keep their sleeping bags inside their backpacks may use a protective ziplock bag or a waterproof pack liner to keep the bag dry. Others may choose to store their sleeping bags in the bottom of their backpacks, using the weight of their other gear to compress the bag. Alternatively, some hikers may opt to strap their sleeping bags to the outside of their packs to save space. However, this method comes with the risk of the bag getting wet or damaged. Ultimately, the decision of whether to carry a sleeping bag inside or outside a backpack depends on various factors, including the size and weight of the bag, the availability of a separate sleeping bag compartment, and personal preference.

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Sleeping bag size and weight

Sleeping bags come in a variety of sizes and weights, and choosing the right one depends on several factors, including your height, the temperature rating, the type of insulation, and the shape of the bag.

Firstly, the length of your sleeping bag should correspond with your height. For example, a 6-foot-tall person should opt for a sleeping bag that is roughly 6 feet 8 inches long. This extra length is necessary because when we lay flat, our spines decompress, and our bodies spread out. It is important to remember that a sleeping bag should not be too tight or too loose, as this can result in a loss of warmth.

Secondly, the temperature rating of a sleeping bag is crucial. It is recommended to choose a bag rated slightly lower than the typical low temperatures you anticipate encountering. A lower temperature rating often means more insulation, which increases the weight of the bag.

The type of insulation also plays a significant role in the weight of a sleeping bag. Advanced synthetics and high-fill-power downs provide greater warmth for less weight. Bags with these insulations are more efficient, delivering more warmth for their weight.

Lastly, the shape of the sleeping bag affects its weight and packability. The most popular shape is the mummy bag, which tapers towards the feet, making it lightweight and ideal for backpacking due to its efficient shape and warmth. Rectangular bags, on the other hand, offer more room and are less restrictive, making them a comfortable option for warm-weather camping.

Some other factors to consider when choosing a sleeping bag include the shoulder girth and hip girth, especially when considering gender-specific designs. A properly fitting sleeping bag will allow for comfort while also maximising warmth. Additionally, a hood adds considerable warmth by trapping heat around your head, so this is another feature to consider when making your decision.

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Backpack size

The size of your backpack will depend on what you are packing inside it and whether you are carrying a tent as well as a sleeping bag. If you are hiking or camping, you will want to keep your backpack as small as possible, ideally under 40L, so that you can carry it comfortably.

If you are packing your sleeping bag inside your backpack, a 40L pack should be big enough. Some hikers have reported that their sleeping bag fits inside a 31L backpack, with plenty of room to spare, while others have managed to fit a sleeping bag inside a 25L pack. If you are using a compression sack, you may need a bigger backpack, as these can be difficult to squeeze into a small space. One hiker with a 40L pack reported that their sleeping bag fits inside the top flap of their backpack, while another hiker with a 50L pack said their sleeping bag took up the majority of the space.

If you are strapping your sleeping bag to the outside of your backpack, you can get away with a smaller pack. However, this method has its drawbacks. A sleeping bag strapped to the outside of your backpack may knock against your rear end as you walk, and it is more likely to get wet, dirty, or torn. It may also affect your balance, pulling harder on your shoulder straps as it moves the centre of gravity away from you.

If you are packing your tent inside your backpack, you will need more space. One hiker reported that they have a tent that fits inside their rucksack, while another has a tent that straps to the sides of their rucksack, keeping the weight well balanced.

Ultimately, the size of your backpack will depend on what you are packing inside it and how you choose to carry your sleeping bag. If you are hiking or camping, you will want to keep your backpack as small and comfortable as possible.

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Weather conditions

Rain and Moisture:

The risk of rain or moisture is a significant factor to consider. If there is a possibility of rain or high humidity, it is generally advisable to keep your sleeping bag inside your backpack. External exposure to rain can dampen your sleeping bag, compromising both your comfort and safety. To mitigate this risk, some hikers recommend using a waterproof bag or liner, such as a trash bag, dry bag, or a protective ziplock bag, to shield the sleeping bag from moisture. This allows them to carry the sleeping bag inside or outside with more confidence.

Dry Conditions:

In dry conditions, attaching the sleeping bag to the outside of your backpack can be a viable option. This approach helps save space inside your pack and doesn't significantly affect the center of gravity. However, it's important to consider the risk of snagging or tearing your sleeping bag on branches or rocks during your hike.

Temperature and Insulation:

The expected temperature and insulation properties of your sleeping bag should also be considered. If you're hiking in cold conditions, a bulky sleeping bag that takes up significant space may be necessary. In such cases, carrying the sleeping bag inside the backpack might be more challenging, and external attachment could be considered. Conversely, in milder conditions, a lighter and more compact sleeping bag might be sufficient, making it easier to accommodate inside the backpack.

In summary, when facing rainy or humid conditions, prioritize keeping your sleeping bag dry by carrying it inside your backpack or using waterproof protection if attached externally. In dry conditions, external attachment can be an option, but always consider the potential hazards of tearing or snagging. Additionally, factor in the temperature and insulation needs of your trip, which may influence the bulkiness of your sleeping bag and how you choose to carry it.

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Centre of gravity

The centre of gravity is an important consideration when deciding whether to carry a sleeping bag inside or outside your backpack. When heavy items are strapped to the outside of a backpack, they can move the centre of gravity away from the body, increasing the strain on the wearer's shoulders and back.

Some hikers prefer to strap their sleeping bags to the outside of their packs to save space, especially if the bag is lightweight and not at risk of getting damaged or wet. However, this can affect the balance of the pack and make it more difficult to carry.

If you decide to carry your sleeping bag inside your backpack, it's important to consider the weight and distribution of the other items in your pack. Sleeping bags can be bulky and take up a lot of space, so you may need to get a larger backpack or invest in a compression sack to reduce the size of your sleeping bag.

Some backpacks have separate sleeping bag compartments, which can make it easier to pack and protect your gear. If your sleeping bag is stored inside your backpack, it's also important to keep it dry, as a wet sleeping bag can be uncomfortable and inefficient.

Ultimately, the decision of where to carry your sleeping bag depends on your personal preferences, the type of bag you have, and the conditions you'll be hiking in.

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Protection from damage

Sleeping bags can be bulky and take up a lot of space in your backpack, so it's worth considering how to pack them to keep them protected from damage. One option is to strap the sleeping bag to the outside of your backpack, which can create more room inside the backpack for other items. However, this method increases the risk of damage to your sleeping bag. When strapped to the outside, the sleeping bag is more likely to rip or get snagged on branches or thorns. It can also swing about when you walk, which can be annoying.

To avoid potential damage, some people prefer to keep their sleeping bag inside their backpack. This method protects the sleeping bag from the elements and reduces the risk of tearing or snagging. It also keeps the sleeping bag dry, which is important as a wet sleeping bag can be uncomfortable and unsafe to use.

If you choose to keep your sleeping bag inside your backpack, you can use a protective liner or a waterproof compression sack to save space and keep your sleeping bag dry. Some people use a trash bag or a dry bag as a liner, while others place their sleeping bag in a protective ziplock bag.

Ultimately, the decision of whether to carry your sleeping bag inside or outside your backpack depends on various factors, including the weather conditions, the terrain, and the size and type of your sleeping bag and backpack.

Frequently asked questions

Carrying a sleeping bag inside a backpack is a good option to protect the bag from the elements, rocks, and branches. It also keeps the weight closer to your centre of gravity, making it more balanced and comfortable. Additionally, it ensures the bag stays dry and clean.

Carrying a sleeping bag outside the backpack saves space inside the bag and is a good option if your bag is too small. It also provides better airflow for the sleeping bag, which can be important to prevent the growth of mould or bacteria.

To carry a sleeping bag inside your backpack, consider using a compression sack to save space. You can also use a waterproof pack liner or dry bag to keep the sleeping bag dry. Make sure to pack the sleeping bag at the bottom of the backpack to utilise the dead space.

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