Ashwin Lewis
Choosing the right stuff sack for your sleeping bag is essential for backpacking, hiking, or camping. Stuff sacks come in a variety of sizes and materials, and the right one for you will depend on factors such as the size and type of your sleeping bag, the activities you plan to use it for, and your storage and transportation preferences. This guide will help you select the appropriate stuff sack for your sleeping bag to ensure a comfortable and enjoyable outdoor experience.
| Characteristics | Values |
|---|---|
| Stuff sack volume calculation | Measure the sleeping bag in centimeters and divide the total by 1000 to calculate the volume in liters |
| Down sleeping bags | Require lesser volume stuff sacks |
| Synthetic sleeping bags | Require higher volume stuff sacks |
| Winter weather sleeping bags | Need a more complex compression sack |
| Backpacking | Compress the sleeping bag as small as possible to save space in the backpack |
| Car camping | A regular stuff sack is sufficient, no need for a compression sack |
| Storing sleeping bags | Use a large canvas, cotton, or nylon bag to allow the bag to breathe |
| Compression sack for very cold weather | Choose a size larger than the upper limit of the volume shown in the Size column |
| Waterproof protection | Choose a compression dry sack made with air-permeable eVent fabric |
| Manufacturer-supplied compression bags | Tend to be on the smaller, high compression end of the spectrum |
| Down models | Aim for 1.5 to 2 times the volume of the sleeping bag |
| Synthetic models | Require more volume for initial stuffing before compression |
| Ultralight stuff sacks | More prone to ripping, be careful not to over-compress |
| Storage | Do not store sleeping bags in stuff sacks; use a box, pillowcase, or bag to allow the bag to loft |
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What You'll Learn
Sleeping bag volume and sack size
Sleeping bags come in a variety of sizes, fills, and materials, and choosing the right stuff sack can be challenging. The volume of the stuff sack depends on the size and shape of the sleeping bag, as well as its fill. Sleeping bags filled with down are more compressible and require smaller volume stuff sacks compared to synthetic-filled bags.
To determine the volume of your sleeping bag in liters, you can follow these steps:
- Place your sleeping bag in a cardboard box that is larger than the bag.
- Press the sleeping bag down firmly until the upper surface is roughly level with the box.
- Measure the average depth of the bag in inches.
- Multiply the length, width, and depth to calculate the volume in cubic inches.
- Convert the volume to liters by dividing the cubic inches by 1000.
It is important to choose the right size stuff sack for your sleeping bag. If you are backpacking, you will want to compress your sleeping bag as much as possible to save space in your backpack. In this case, a compression sack is recommended. The Granite Gear Round Rock Solid Compression Sack is a popular option.
On the other hand, if you are car camping or transporting your sleeping bag from home to the campsite, a regular stuff sack will suffice. Stuff sacks made from lightweight and durable materials, such as Dyneema Composite Fabric, are ideal as they keep your gear organized without adding extra weight.
When choosing a stuff sack, it is important to consider the climate and your intended use. If you are using your sleeping bag in very cold weather, it is recommended to choose a size larger to accommodate extra layers or a thicker sleeping bag. Additionally, if you require external mounting, a lightweight and water-resistant compression sack might be a better option.
It is worth noting that sleeping bags should not be stored in their stuff sacks for extended periods. Instead, they should be stored in a larger container, such as a pillowcase or a box, to maintain their loft and longevity.
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Compression sacks vs. regular stuff sacks
When choosing a stuff sack for your sleeping bag, you'll want to consider the size and shape of the sleeping bag, as well as the fill. Sleeping bags filled with down are more compressible than synthetic-filled ones and require less volume. Synthetic bags, on the other hand, don't compress as much, so you'll need a higher-volume stuff sack. If you're backpacking, you'll want to compress your sleeping bag as much as possible to save space in your backpack. In this case, a compression sack is a good option.
Compression sacks are designed to reduce the volume of your gear, making them ideal for backpacking or hiking when space is limited. They come in various sizes, from small bags for personal items to larger options for sleeping bags. Compression sacks can be compressed in two ways: using a one-way purge valve that releases trapped air when pressed down, or by using permeable fabrics like eVent that allow air to escape while keeping water out. Some compression sacks also feature compression straps, allowing for even extraction of air from inside the bag. While compression sacks are excellent for space-saving, they may not be the best choice if you're looking for the lightest option available.
Regular stuff sacks, on the other hand, are simple bags used to store and transport your sleeping bag. They don't have the same compression capabilities as compression sacks but are perfect for car camping or situations where space is not a concern. Regular stuff sacks are often made of lightweight and breathable materials like canvas, cotton, or nylon, making them ideal for storing your sleeping bag at home. They come in various sizes and styles, and some even offer water resistance or waterproofing.
When choosing between a compression sack and a regular stuff sack, consider your specific needs. If you're looking to save space and weight while backpacking, a compression sack is a better option. If you have more flexibility with space and want a simple and breathable storage solution, a regular stuff sack will suffice. It's worth noting that down sleeping bags should not be stored long-term in a compressed state, as it may affect their resiliency and lofting ability.
In terms of specific liter recommendations, a 35-liter stuff sack is generally recommended for a sleeping bag. However, it's always a good idea to refer to the manufacturer's guidelines for your particular sleeping bag to ensure you get the right size.
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Down vs. synthetic fills
The choice between down and synthetic fills for your sleeping bag is important as it will directly affect the warmth, weight, water resistance, compressibility, and price. Here is a detailed comparison between the two:
Down sleeping bags are excellent insulators, with a higher warmth-to-weight ratio than synthetic insulation. This is because down lofts more, requiring less down to fill the same area as synthetic material. Down sleeping bags are also lighter and more easily compressed into stuff sacks, making them a favourite among backpackers as they take up less space.
However, down has a major weakness when it comes to moisture. Down tends to clump up and lose loft when it gets wet, causing it to lose its insulating properties. While treatments have been developed to make down more water-resistant, they are not entirely waterproof and will still get wet if submerged in water or exposed to heavy rain. Down sleeping bags also tend to be more expensive than synthetic ones. In addition, down sleeping bags may develop cold spots in compressed areas, requiring an additional insulating layer such as a foam or inflatable sleeping pad.
Synthetic sleeping bags, on the other hand, are typically made of polyester, a hydrophobic material that dries quickly and insulates even when wet. Synthetic insulation is also less expensive, durable, and hypoallergenic. Synthetic sleeping bags are available with either short-staple or continuous filament insulation. Short-staple insulation features densely packed fine-denier filaments, resulting in a soft and flexible sleeping bag with great compressibility, although it is less durable and prone to the creation of cold spots. Continuous-filament insulation uses thicker filaments that provide loft, strength, and durability.
Some manufacturers also offer hybrid sleeping bags that combine water-resistant down and synthetic insulation to provide the benefits of both materials while minimising their respective imperfections. Ultimately, the decision between down and synthetic fills depends on factors such as the expected weather conditions, weight considerations, and budget.
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Backpacking vs. car camping
When it comes to outdoor adventures, backpacking and car camping offer distinct experiences. The main difference between the two lies in the mobility and proximity to one's vehicle during the trip. Backpacking involves carrying all your gear on your back and often includes hiking to more remote destinations, whereas car camping typically means setting up camp close to your vehicle in established campsites.
The choice between backpacking and car camping also impacts your gear selection, particularly when it comes to sleeping bags. Here are some key considerations:
Compressibility and Volume
When backpacking, you want to minimise weight and bulk. Sleeping bags with down filling are more compressible than synthetic-filled ones and require smaller stuff sacks. Backpacking sleeping bags should be as compact and lightweight as possible, so look for higher fill power ratings, which indicate warmer and lighter bags.
For car camping, you don't need to worry about compressing your sleeping bag into a small stuff sack. Synthetic insulation sleeping bags, which are heavier and less compressible, can be a good option for car campers as they retain their insulating properties when wet.
Temperature Ratings
Consider the temperature range you expect during your trip. Backpacking sleeping bags should have higher temperature ratings to keep you warm in colder conditions, as you may be camping in more remote areas. Car camping bags can be less specialised as you have the comfort of your vehicle nearby.
Space and Comfort
Backpacking sleeping bags tend to be more snug and form-fitting to reduce weight and bulk. In contrast, car camping bags offer more room to move around, and you can prioritise comfort and spaciousness.
Choosing a Stuff Sack for Your Sleeping Bag
The size of the stuff sack depends on the volume of your compressed sleeping bag. To determine the required volume, you can measure the dimensions of your compressed bag and calculate the volume in litres. Alternatively, stuff sacks are often sized based on the type and size of the sleeping bag, so you can refer to sizing charts provided by manufacturers.
For backpacking, aim for the smallest possible stuff sack that fits your compressed bag to maximise space in your backpack. For car camping, a regular stuff sack is sufficient, and you don't need to focus on compressing your sleeping bag as much.
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Storage at home
When storing your sleeping bag at home, it is recommended to use a large canvas, cotton, or nylon net bag. This allows the bag to breathe, which is particularly important for goose down sleeping bags.
Sleeping bags vary in their packed volume, depending on their fill, shell, and liner fabrics. Down bags are more compressible than synthetic-filled bags and need lesser volume stuff sacks. Synthetic bags, on the other hand, do not compress as much and require higher volume stuff sacks.
To determine the volume of your sleeping bag in liters, you can use the following method:
- Place your sleeping bag in a cardboard box that is larger than the bag.
- Press the sleeping bag down firmly until the upper surface is roughly level with the box.
- Measure the average depth of the compressed bag in inches.
- Multiply the length, width, and depth to calculate the volume in cubic inches.
- Convert the volume to liters by dividing the cubic inches by 1000.
It is important to note that sleeping bags should not be stored in their stuff sacks for extended periods as they need room to breathe. Instead, you can repurpose a box, pillowcase, or bag to store your sleeping bag at home.
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Frequently asked questions
The size of the stuff sack depends on the size and shape of the sleeping bag, as well as its fill. Sleeping bags with down fills are more compressible than synthetic ones and require smaller volume stuff sacks. If you're backpacking, you'll want to compress your sleeping bag as much as possible.
Place your sleeping bag in a cardboard box and press it down firmly until the upper surface is roughly level. Measure the average depth of the bag in inches and multiply it by the length and width to get the volume in cubic inches. Then, divide this number by 1000 to get the volume in litres.
If you're backpacking, you'll need a compression sack to minimise the space your sleeping bag takes up in your backpack. If you're car camping, a regular stuff sack will do. Compression sacks are also available in waterproof and water-resistant options, which are ideal for outdoor use.
Do not store your sleeping bag in a stuff sack when not in use, as this can damage it. Instead, store it in a box, pillowcase, or old hockey bag to allow it to breathe and maintain its loft.
