
Sleeping bags are often the bulkiest item in a backpacker's kit, and they can be tricky to pack. Improper packing can result in a wet, heavy lump that's uncomfortable to sleep in. To avoid this, it's recommended to keep your sleeping bag inside your backpack, which protects it from the elements and makes it easier to carry. If your bag doesn't fit inside, there are several methods to attach it to the outside of your pack. This guide will cover how to pack a sleeping bag inside your backpack and the various ways to attach it externally if it doesn't fit.
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What You'll Learn

Use a compression sack to minimise space
Compression sacks are a great way to minimise space when packing your sleeping bag into your backpack. They are modified stuff sacks that compress their contents by squeezing out all the air. They are made of nylon and have a drawstring closure. The sacks have attached straps that can be used to pull the two ends of the sack together, compressing the contents into a small, dense bundle. This bundle can then be easily placed inside your backpack.
Compression sacks are ideal for reducing the volume of bulky items like sleeping bags, pillows, and extra clothing. They help to free up valuable space in your backpack, allowing you to bring more essential items without adding extra weight or bulk. This makes your pack more manageable and comfortable to carry. Additionally, compression sacks help to preserve the condition of your gear. Unlike folding or rolling your sleeping bag, which can create creases and wear down the insulation, stuffing it into a compression sack maintains the loft and warmth of the material, extending its lifespan.
When choosing a compression sack, you'll find a wide range of sizes, styles, and materials available to suit your specific needs. For example, the Sea to Summit Ultra-Sil Compression Sack is a popular option that can compress its contents to a fraction of their original size. You can also find compression sacks made of nylon, which have a slippery finish that makes them easy to slide into tight spaces in your pack.
While compression sacks are a valuable tool for maximising space, it's important not to overuse them. Stuffing too many items into compression sacks can lead to wasted space, similar to the gaps in a stack of firewood. Instead, consider packing some items loose in your backpack, especially bulky items like sleeping bags, as this can sometimes result in a more efficient use of space.
Overall, incorporating a compression sack into your packing routine can be a game-changer, especially for outdoor enthusiasts and those who tend to overpack. By minimising the space taken up by your sleeping bag, you'll have more room for the essential gear you need for your adventures.
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Waterproof your bag
Waterproofing your bag is essential to ensure your belongings remain dry during unpredictable weather conditions. Here are some detailed methods to achieve this:
Waterproof Spray and Seam Sealant
Firstly, select a high-quality waterproofing spray to reduce the risk of damage to your bag from harmful chemicals. Before applying the spray, test a small, inconspicuous section of the bag. Once you've determined that the spray is safe, apply it to the exterior of your bag. After spraying, use a good-quality silicone sealant to cover all stitch holes and seams. Allow the sealant to dry for at least 24 hours. Be cautious when applying the sealant around buckles and zippers, as it can be challenging to remove if it gets on these areas.
Waterproof Pack Liner
Use a sealable, waterproof liner inside your backpack's main compartment. This will create a barrier to protect your belongings from water. Trekrite Waterproof Rucksack Liner and Osprey Ultralight Pack Liner are reputable brands offering a range of sizes.
Individual Dry Bags
Place your sleeping bag, clothing, and electronics into individual dry bags before putting them into your backpack. This method allows you to compartmentalize your belongings, ensuring that your items are protected from rain or sudden water submersions. Ultra Dry Waterproof Bag is a reputable brand offering various sizes and colours, often with a separate phone holder.
Waterproof Trash Compactor Bag
Line the interior of your backpack with a trash compactor bag. This method is simple and effective, providing an extra layer of protection to keep your belongings dry. Ensure you use a thick, non-stretchy trash bag that can withstand rugged conditions.
Rain Cover
Most backpacks come with a rain cover, usually bundled in a dedicated compartment. When it starts to rain, simply pull out the rain cover and place it over your backpack to protect your belongings from getting wet. Rain covers are inexpensive, lightweight, and pack down small, making them a convenient option for waterproofing your bag.
By following these methods, you can effectively waterproof your bag and protect your belongings from unexpected weather conditions.
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Attach to gear loops
If your backpack has gear loops, you can use them to attach your sleeping bag. Gear loops are meant for attaching gear like sleeping bags. If your sleeping bag stuff sack has adjustable straps, you can attach them to the gear loops on your backpack. Make sure to pull the straps tight so that the sleeping bag doesn't swing around as you move.
If your sleeping bag stuff sack doesn't have straps, you can use a bungee cord to attach it to the gear loops. Hook the cord into one of the loops on one side of your backpack, wind it tightly around your pack several times, and then hook the other end into the other side of your backpack.
Using gear loops to attach your sleeping bag can add weight to your backpacking kit and throw off your centre of balance, making you more prone to tripping and falling on uneven terrain. Therefore, it is recommended to use the gear loops for attaching lightweight items that you may want to access during the day, such as trekking poles.
Additionally, attaching your sleeping bag to the outside of your backpack can expose it to tree branches, rocks, and other elements that can rip through your stuff sack and sleeping bag. It can also get wet, so it is important to consider the weather conditions and the terrain you will be traversing before deciding to attach your sleeping bag to the outside of your backpack.
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Use bungee cords
Bungee cords are a great way to attach a sleeping bag to the outside of your backpack. They are designed to help grasp bulky, soft items that might not fit inside your backpack. Bungee cords are elasticated and have a hook on either end.
To attach a sleeping bag to your backpack using bungee cords, first, place your sleeping bag underneath the elastic cord. If your sleeping bag is long, position it higher up so it doesn't hang off the bottom of the backpack. If it is a smaller bag, centre it along the exterior of the backpack for maximum grip. Then, hook the bungee cords into the loops on your backpack and wind them around both the bag and the sleeping bag. Criss-cross the cord several times for added security.
If you are using an internal-frame backpack, attach one of the hooks to one side of your pack, then criss-cross the cord before attaching the second hook to the other side. If you are using an external-frame backpack, simply attach the hooks to the frame. If the cord feels loose, wrap it around the frame a few times until your sleeping bag is held tightly.
Bungee cords are a convenient way to carry bulky items, but it is important to remember that they are designed to be stretchy. Therefore, it is not advisable to secure heavy items with bungee cords, as they may bounce around. Always check that whatever you attach to your backpack is secure and not in danger of falling off.
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Pack inside the backpack
Sleeping bags are one of the bulkiest items a backpacker carries, so it's important to pack them efficiently. The best place for your sleeping bag is typically inside your backpack if possible, as this protects it from the weather and snags, and keeps the weight closer to your body, making it easier to carry.
Firstly, consider getting a stuff sack so you can pack the sleeping bag in a smaller volume. One option is a compression sack, which has cinch straps to further compress the bag after packing. The minimal amount of extra weight from the sack can be worth it for the reduction in volume, and the protection against tears. Alternatively, you can simply stuff the bag into your backpack and let it fill the empty spaces. If you are using a stuff sack, you can place the bag at the bottom of your pack, as you won't need it during the day.
If your sleeping bag is too big to fit inside your backpack, you can attach it to the outside. You can use the lid, compression straps, gear loops, bungee cords, or tie points at the bottom of your backpack. If you attach it to the bottom of your bag, it may knock against your rear end as you walk, and it will be in contact with the ground when you set your bag down, so it is preferable to attach it to the top.
To protect your sleeping bag from water, you can use a waterproof stuff sack or rucksack, or line your backpack with a trash compactor bag. You can also fold the sleeping bag in half lengthwise and roll it up before placing it in its sack.
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Frequently asked questions
It is recommended to keep your sleeping bag inside your backpack. This can be done by compressing it into a stuff sack and placing it at the bottom of your backpack. If your sleeping bag doesn't fit, consider swapping to a dry bag or using the tie points at the bottom of your backpack.
A stuff sack is a bag that you can pack your sleeping bag into to reduce its volume. Compression sacks are a type of stuff sack that can further compress the sleeping bag using cinch straps.
First, fold the sleeping bag in half, then roll it up as tightly as you can. Next, place the rolled-up sleeping bag into the stuff sack and pull the cord tight. Finally, place the stuffed sack at the bottom of your backpack.
If your backpack has gear loops, you can attach the adjustable straps of your stuff sack to them. Alternatively, you can use bungee cords by hooking them into the loops on your backpack and winding them around both the backpack and sleeping bag.
It is recommended to keep your sleeping bag inside your backpack to protect it from the weather. If this is not possible, you can use a waterproof pack liner or dry bag to keep it dry.











































