
When going backpacking, it is essential to consider how to pack your sleeping bag. There are several factors to consider, such as the type of insulation, bag shape, and temperature rating. However, one of the most important considerations is whether to keep the sleeping bag inside or outside your backpack. Some people prefer to strap the sleeping bag to the outside of their backpack to save space inside. Others argue that keeping the sleeping bag inside the backpack is better as it stays dry and protected from potential damage caused by rocks or branches. Ultimately, the decision depends on personal preference and the specific circumstances of the backpacking trip.
| Characteristics | Values |
|---|---|
| Sleeping bag placement | Inside the backpack, at the bottom |
| Sleeping bag type | Lightweight, with a good warmth-to-weight ratio |
| Sleeping bag shape | Rectangular, semi-rectangular, or mummy |
| Sleeping bag insulation | Down or synthetic |
| Sleeping bag shell fabric | Polyester or nylon with a durable water repellent (DWR) finish |
| Sleeping bag lining fabric | Soft and warm texture |
| Sleeping pad | Compatible with the sleeping bag, with a high R-value |
| Pillow | Separate or a pocket in the sleeping bag |
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What You'll Learn
- Sleeping bags should be kept dry, so it's best to pack them inside your backpack
- If you decide to strap your sleeping bag outside your backpack, use closed-loop tie-downs
- Sleeping bag weight and bulkiness are important factors when backpacking
- Sleeping bag insulation type and warmth-to-weight ratio are key considerations
- Sleeping bag shape impacts warmth and comfort

Sleeping bags should be kept dry, so it's best to pack them inside your backpack
Sleeping bags are one of the heavier, bulkier items in your backpack, so it's important to consider how to pack them efficiently. One of the key considerations when backpacking is keeping your sleeping bag dry. Therefore, it is generally best to pack your sleeping bag inside your backpack.
Firstly, when you strap items to the outside of your backpack, you risk damaging them. For example, if you put your backpack down on rocks or branches, they could poke holes in your sleeping bag. This is less of a concern if you have a very durable waterproof bag for your sleeping bag. However, even if you do have a durable bag, keeping your sleeping bag inside your backpack will help to protect it from the elements.
Secondly, when you pack your sleeping bag inside your backpack, the weight is closer to your centre of gravity, which makes your backpack more comfortable to carry and easier to balance. In contrast, strapping heavy items to the outside of your backpack moves the centre of gravity away from your body, pulling harder on your shoulder straps.
Thirdly, if you pack your sleeping bag inside your backpack, you can make use of compression sacks to reduce its volume. Many sleeping bags come with a stuff sack, which allows you to compress the bag down small for easy packing. You can also buy a separate compression sack for your sleeping bag. This will help to save space in your backpack, leaving more room for other items.
Finally, some sleeping bags are designed to be packed inside your backpack. For example, the outer shell of a backpacking bag is typically made of ripstop nylon or polyester, which is treated with a durable water repellent (DWR) finish to prevent moisture from soaking through and dampening the fill. Therefore, keeping your sleeping bag inside your backpack will make the most of its DWR finish, helping to keep it dry.
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If you decide to strap your sleeping bag outside your backpack, use closed-loop tie-downs
If you decide to strap your sleeping bag outside your backpack, it is recommended to use closed-loop tie-downs. Closed-loop tie-downs are threaded through a closed loop on both your backpack and your sleeping bag, ensuring that the gear remains chained to your pack even if it slides off. This method can help prevent potential damage to your sleeping bag, such as poking holes in the cover if your backpack is placed on rough surfaces.
When attaching your sleeping bag externally, it is crucial to consider the centre of gravity and balance. Carrying heavy items outside the backpack shifts the centre of gravity away from your body, pulling harder on the shoulder straps. Therefore, it is advisable to pack lighter items, such as a sleeping bag, externally to maintain balance and comfort.
To securely attach your sleeping bag, ensure that it is placed inside a stuff sack or a similar container that is strong, waterproof, and has loops for straps. A waterproof bag is essential to keep your sleeping bag dry, as moisture can affect its insulation and warmth. The stuff sack can then be strapped to the bottom or top of your backpack using the closed-loop tie-downs.
Additionally, consider the durability of your sleeping bag and the terrain you will be traversing. If there is a risk of snagging or tearing your gear, it may be preferable to pack your sleeping bag inside your backpack for added protection. This is especially important if your sleeping bag is not stored in a durable waterproof bag. By packing it inside, you can also save yourself the hassle of jury-rigging a compression strap setup to secure your sleeping bag externally.
In conclusion, while personal preference plays a role in the decision, using closed-loop tie-downs to secure your sleeping bag externally can offer benefits such as balance, protection from damage, and ensuring the dryness of your sleeping bag. However, always consider the terrain and the durability of your gear when making this decision.
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Sleeping bag weight and bulkiness are important factors when backpacking
The weight of a sleeping bag is largely determined by its insulation and shape. More efficient insulations, like advanced synthetics and high-fill-power downs, deliver greater warmth for less weight. The shape of the bag also affects its weight; the "mummy" shape, for example, boosts warmth and cuts weight by having a snug fit.
When packing your bag, it's generally recommended to keep it inside your backpack, which provides better protection from the elements and helps keep the weight close to your centre of gravity. However, some backpackers prefer to strap their sleeping bag to the outside of their pack to save space inside. This can affect your balance and may damage your gear if you're not careful.
To reduce bulkiness, you can compress your sleeping bag using a stuff sack or a compression bag. Some sleeping bags come with a stuff sack, but these are sometimes sold separately. You can also try packing techniques such as rolling your sleeping bag or packing it at the bottom or top of your backpack.
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Sleeping bag insulation type and warmth-to-weight ratio are key considerations
When deciding on a sleeping bag for backpacking, the insulation type and warmth-to-weight ratio are key considerations.
The insulation type is the primary factor influencing the size of a backpacking sleeping bag when compressed in its stuff sack for carrying. Down insulation is generally more expensive, lighter, more compressible, and offers a superior warmth-to-weight ratio compared to synthetic insulation. Down fill is also more durable, retaining consistent warmth over a longer period. However, synthetic insulation is more affordable, performs better in damp conditions, and continues to insulate when wet. Advanced synthetic insulation can deliver greater warmth for less weight. The choice between down and synthetic insulation will depend on your budget, the weather conditions, and your preference for warmth and weight distribution.
The warmth-to-weight ratio is a critical factor in the sleeping bag selection process, as a cold backpacker will struggle to sleep well. It is advisable to select a bag with a slightly lower temperature rating than the typical low temperatures expected on your backpacking trips. The R-value of your sleeping pad, which forms part of your sleep system, is another important variable to consider. The weight of the sleeping bag is also influenced by the quality of the insulation and the cut of the bag. Lighter sleeping bags can enhance your backpacking experience by reducing fatigue and increasing mobility, but it is crucial to strike a balance between weight savings and adequate insulation for comfort and warmth.
The shape of the sleeping bag also impacts its weight and warmth. Mummy-shaped bags, for instance, are designed to boost warmth and cut weight by providing a snug fit. In contrast, rectangular bags offer more room for legs and arms to stretch out but may sacrifice warmth. Semirectangular bags offer a compromise between warmth and roominess. Sleeping quilts are gaining popularity in the ultralight backpacking community due to their impressive weight-to-warmth ratio and versatility.
When choosing a sleeping bag, it is essential to consider your specific needs and preferences. Evaluate the expected weather conditions, your budget, and the level of warmth and comfort required for a good night's sleep. By considering these factors, you can make an informed decision about the insulation type and warmth-to-weight ratio of your backpacking sleeping bag.
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Sleeping bag shape impacts warmth and comfort
Sleeping bags come in three basic shapes: rectangular, semirectangular (or "modified mummy"), and mummy. The shape of your sleeping bag can significantly impact its warmth and comfort.
Rectangular sleeping bags offer ample room for legs and arms to stretch out and are ideal for camping trips where you don't have to worry about weight or packing constraints. Some rectangular bags can be fully unzipped and used as blankets. This shape is a good choice if you prioritise comfort and roominess over warmth.
Semirectangular or "modified mummy" bags offer a compromise between warmth and roominess. They come in various shapes, providing a good balance if you want some extra space without sacrificing too much warmth.
Mummy bags have a snug fit, boosting warmth and reducing weight. With this style, you roll over with your bag instead of inside it. Mummy bags are ideal if you're looking for a lightweight option for backpacking and don't mind sacrificing some roominess for added warmth.
The shape of your sleeping bag also influences its weight, with more roomy bags generally weighing more. Additionally, the type of insulation used affects the weight, with advanced synthetics and high-fill-power downs providing greater warmth for less weight.
When choosing a sleeping bag, it's essential to consider the temperature rating, insulation type, and your personal preferences for comfort and warmth. It's recommended to select a bag with a lower temperature rating than the lowest anticipated temperatures during your backpacking trips. Trying out different bags in-store can help you determine which styles and shapes suit you best.
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Frequently asked questions
Yes, it should be kept inside a bag or backpack to protect it from the elements, rocks, and branches. It is also more comfortable to have the weight of the sleeping bag close to your back.
The warmth-to-weight ratio is key. The bag should be lightweight and provide ample warmth. Other factors to consider include temperature rating, type of insulation, bag shape, and extra features.
The two main types are down fill and synthetic fill. Down fill is typically more efficient and provides greater warmth for less weight. Synthetic fill is often more affordable and ethical, as it does not use animal products.
Some sleeping bags include a "pillow pocket," allowing you to stuff clothes inside to create a pillow. Sleeping bags also come in different shapes, such as rectangular, semi-rectangular, and mummy, offering varying levels of roominess and warmth.
Consider using a compression bag or stuff sack to reduce the volume of the sleeping bag. You can also place it inside a protective bag, such as a ziplock bag, to keep it dry and then sit on it to remove the air before sealing it shut.











































