Miya Pearson
Combining two sleeping bags is a cost-effective way to stay warm when camping in cold weather. While it is possible to zip two compatible sleeping bags together, it is more common to layer one bag on top of the other. The inner bag should be thinner to maximise loft (fluffiness) and insulation. Combining sleeping bags may result in a loss of breathability, causing the setup to become hot and stuffy. It is important to test the setup before camping in a remote location.
| Characteristics | Values |
|---|---|
| Combining sleeping bags | It is possible to combine sleeping bags by zipping them together or layering one on top of the other. |
| Temperature rating | The temperature rating of combined sleeping bags is challenging to determine. It depends on the individual bag ratings and the number of layers used. |
| Insulation | Combining sleeping bags may affect insulation and warmth. Nesting bags can compress the insulation of the inner bag, reducing its effectiveness. |
| Breathability | Using multiple sleeping bags can reduce breathability, leading to a stuffy and sweaty experience. |
| Weight and bulkiness | Combining sleeping bags increases the overall weight and bulk, which may be inconvenient to carry, especially during backpacking trips. |
| Compatibility | Some sleeping bags are specifically designed to be compatible with certain models, such as men's and women's versions of the same bag. |
| Testing | It is recommended to test the combined sleeping bag setup before relying on it in remote locations. Backyard testing or cabin camping can help determine its effectiveness. |
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What You'll Learn
Combining sleeping bags can save you money
Combining two sleeping bags can be a great way to save money and stay warm. If you already have two sleeping bags, you can use them together to create a warmer bag without the expense of buying a new one. This is especially useful for occasional winter campers who don't want to invest in a dedicated winter bag. By layering the bags, you can trap air and increase insulation, resulting in a warmer sleeping setup.
However, there are a few considerations to keep in mind. Firstly, the combined weight and bulkiness of the two bags can be an issue. Two bags will generally weigh more than a single colder-temperature bag due to the extra zippers and material. Additionally, it can be challenging to determine the exact temperature rating of the combined setup. While you can calculate the fill weight of both bags and add them together, you also need to account for the compression of the inner bag's insulation, which may reduce its effectiveness.
Another potential drawback is the loss of breathability when combining two sleeping bags. The setup may become hot and stuffy, trapping your sweat and leading to evaporative heat loss. To mitigate this, some people drape the second sleeping bag over the first or unzip it and nest only the foot area, creating air gaps that improve breathability.
It's important to ensure that combining the two bags does not compromise the insulation of either bag. The inner bag should not be too constricted, and the outer bag should not be too heavy, squashing the lower bag. Additionally, consider the compatibility of the bags; some sleeping bags are designed to zip together, but others may not be compatible or may require matching men's and women's models.
While combining sleeping bags can save you money, it may not always be the most comfortable or convenient option. It's essential to test the setup before relying on it for a camping trip. If you plan to be in extremely cold conditions or engage in multi-night trips, investing in a dedicated winter bag or considering other insulation options, such as insulated clothing or blankets, might be more suitable.
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Two bags together may not provide adequate warmth
Combining two sleeping bags may seem like a great way to save money and increase warmth. However, there are a few drawbacks that could lead to a less-than-comfortable night's sleep. Firstly, the insulation of the inner bag may become compressed, reducing its ability to trap heat. This compression can be minimised by placing the thinner bag inside and ensuring the outer bag has a slim profile. But even with this configuration, the combined bulk and weight of two bags may be uncomfortable and impractical, especially for backpacking trips where every pound counts.
Another issue with combining sleeping bags is the potential loss of breathability. The nested bags can trap sweat, leading to a damp and cold sleeping environment. This is where the type of sleeping bag comes into play. Synthetic bags can handle moisture better than down bags, so it's advisable to have a synthetic bag on the outside, where it is more likely to come into contact with condensation. However, a heavy synthetic bag on top can compress the bag beneath it, reducing overall insulation.
Additionally, it can be challenging to determine the temperature rating of a combined sleeping bag setup. While you can add the temperature ratings of the individual bags, this calculation may not accurately reflect the actual warmth provided. Factors such as the combined loft of the insulation, the sleeper's metabolism, and the use of additional insulating layers can all influence the overall warmth. Therefore, relying solely on the temperature ratings of the individual bags can be misleading and potentially dangerous if the bags are used in extremely cold conditions.
Finally, combining sleeping bags may not be feasible for all products. Some sleeping bags are designed with specific zippers that only mate with certain models, limiting their compatibility. This means that even if you have two similar bags, they may not be able to zip together securely. It is essential to check the specifications of your sleeping bags before assuming they can be combined.
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Some sleeping bags are designed to zip together
Combining two sleeping bags to make one warmer bag is possible. Some sleeping bags are designed to zip together, such as those from NEMO, which offers a Lifetime Warranty on its products. NEMO sleeping bags are designed so that the men's version zips to the women's version. However, two men's bags and two women's bags cannot be zipped together. Some NEMO bags are only compatible with the men's or women's model of the same bag model. For example, Tempo and Kayu will only zip together with other Tempos and Kayus, while Riff, Disco, and Forte are compatible with each other, men's to women's.
It is important to note that models may not be backward compatible, as a newer Tempo might not zip into an older Tempo. Additionally, the type and size of zippers may not always match between models or manufacturers, and the shape of the bags may also affect the fit when zipping them together. Therefore, it is advisable to contact the manufacturer before purchasing if compatibility is a concern.
When combining sleeping bags, it is recommended to put the thinner bag inside, as the insulation may become compressed, reducing its ability to trap heat effectively. This can result in a loss of breathability, leading to a hot and stuffy environment. Additionally, the weight of the combined bags may become bulky and cumbersome.
Before relying solely on a two-bag setup, it is essential to test it out in a controlled environment, such as in your backyard or near a cabin, to ensure that it provides sufficient warmth and comfort. This is especially crucial if you are backpacking in remote locations, as a lack of warmth could be dangerous.
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Nesting bags may result in condensation
Combining two sleeping bags can be a cost-effective way to stay warm during cold weather camping. However, this method has its drawbacks, and one of the most significant concerns is the issue of condensation. Nesting sleeping bags can indeed result in condensation, and this can have several causes. Firstly, condensation occurs when the air is humid, and the surface of the bag is cold, causing the moisture in the air to condense on the bag. This external condensation can also be influenced by factors such as fog and the design of your tent. For instance, double-walled tents can prevent you from touching the condensation, but they don't stop it from forming. Additionally, steep sidewalls on the fly can minimize condensation by redirecting rainwater.
Another source of moisture is from within the bag itself. During sleep, individuals release several pints of water vapour, which can condense on the surface of the bag or be trapped within the bag, especially if the bag's insulation is compressed. This can lead to a stuffy and uncomfortable sleeping environment. To mitigate this, it is recommended to use long underwear made from absorbent materials like wool to help manage body moisture. Additionally, a vapor barrier liner can be used to contain the moisture released by the sleeper, keeping the bag dry.
The type of sleeping bag also plays a role in condensation management. Synthetic bags are generally better at handling moisture, as they can withstand getting wet more effectively than down bags. Down bags, on the other hand, are more susceptible to damage from condensation, as the moisture can wet the insulation and compromise its effectiveness. However, down bags are often preferred due to their superior warmth-to-weight ratio. To protect down bags from condensation, it is advisable to use a bivy bag or a light plastic tarp over the sleeping bag. Additionally, drying the bag in sunlight or a well-ventilated room can help restore its condition.
It is worth noting that combining sleeping bags may not always provide the expected warmth, especially in extremely cold conditions. While nesting bags can offer some additional insulation, it is crucial to consider the potential for condensation and the subsequent loss of warmth due to evaporative heat loss. Therefore, it is recommended to test the nested bag setup in a controlled environment, such as your backyard or a rented cabin, before relying on it for multi-night trips or backpacking adventures in remote locations.
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The thinner bag should go inside
Combining two sleeping bags is a great way to save money and stay warm during cold-weather camping. However, simply stuffing one bag inside the other may not be the best solution as it can reduce the insulation of the inner bag, making it less effective at retaining heat. So, when combining two sleeping bags, it is generally recommended to put the thinner bag inside.
Additionally, the type of sleeping bag—synthetic or down—can also impact your decision. Synthetic bags can handle moisture better, so if there's a risk of condensation or moisture, it's better to have the synthetic bag on the outside to prevent the down bag from getting wet. However, down bags handle sweat moisture better, so if you tend to sweat a lot during sleep, consider putting the down bag on the inside.
It's important to note that combining sleeping bags may not always provide accurate temperature ratings. The combined warmth of two nested bags can vary depending on individual factors, such as how warm of a sleeper you are. Therefore, it's recommended to test your combined sleeping bag setup before relying on it during cold-weather camping trips. Try it out in your backyard or on a short camping trip with a cabin nearby for backup.
By following these guidelines and testing your setup in advance, you can confidently combine your sleeping bags to stay warm and comfortable during your outdoor adventures.
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Frequently asked questions
Yes, you can combine sleeping bags. Combining two sleeping bags can make a warmer bag.
There are two ways to combine sleeping bags. The first is to put one bag inside the other, with the thinner bag on the inside. The second is to zip two compatible bags together. Some sleeping bags, such as those made by NEMO, are designed to zip together.
There is no exact way to calculate how warm two nested sleeping bags will be. The warmth of the combined sleeping bags will depend on the combined loft of the insulation on top.
Combining sleeping bags can result in a bulky and heavy setup. Additionally, the insulation of the inner bag may become compressed, reducing its effectiveness. There is also a risk of losing breathability, leading to condensation and evaporative heat loss.
