Evie Summers
When preparing for a trip to Peru, it is important to consider the temperature rating of your sleeping bag. The temperature ratings are based on an average sleeper and allow you to compare bags from different brands. However, real-world comfort may differ from lab-tested temperature ratings due to various factors such as clothing, gear, body type, weather conditions, and more. Peru offers a range of outdoor activities such as hiking, trekking, and mountaineering, and the climate can vary significantly. Cusco, a city in the Peruvian mountains, is known for being colder than other northern cities or the jungle regions of Peru. For outdoor activities in Peru, it is generally recommended to choose a sleeping bag with a lower temperature rating than the lowest expected nighttime temperature. Additionally, features such as a snug-fitting hood, multiple zipper sliders, stash pockets, and a stuff bag can enhance the warmth and functionality of your sleeping bag.
| Characteristics | Values |
|---|---|
| Temperature ratings | 0F / -18C or 20F / -7C |
| Shape | Rectangular, semi-rectangular, or mummy |
| Zipper features | Multiple sliders, snag protector, or cover |
| Storage | Stuff sack, storage sack, or mesh bag |
| Liner | Silk liner for added warmth and comfort |
| Weight | Lightweight for hiking, heavier for camping |
| Size | Compact for hiking, roomy for camping |
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What You'll Learn
Sleeping bag temperature ratings
Sleeping bags are an essential piece of equipment for any outdoor adventure, and choosing the right one can ensure a good night's sleep. The temperature rating of a sleeping bag is a key factor in making your selection. This rating system can be a little complicated, but it is an important guide to help you choose the right bag for your needs.
The temperature rating of a sleeping bag is determined through standardised laboratory tests, which produce a rating range for each bag. The tests simulate how a sleeping bag is used, with a test dummy dressed in base layers inside the bag, and a sleeping pad placed underneath. The ISO (International Standards Organization) now oversees the testing, using a similar method to the original EN (European Norm) standard. The ISO 23537 standard bases its comfort rating on a "standard woman" who is not shivering "in a relaxed posture". The lower-limit rating is based on a standard man who is not shivering in a curled-up position inside the bag.
It is important to remember that temperature ratings are estimates and not precise indicators of how comfortable you will be in a particular bag. The tests cannot account for all variables, such as differences in body types, clothing, weather conditions, and sleeping pads. Therefore, the comfort level you experience outdoors may differ from the tested temperature rating. The ratings are useful for comparing bags from different brands and ensuring you get a suitable bag for the conditions you will encounter.
When choosing a sleeping bag, it is generally recommended to select one with a lower temperature rating than the lowest expected temperature at your camping location. This is because you can always unzip the bag if it gets too warm, but you don't want to be caught shivering in the middle of the night. If you plan to use your bag in colder months, look for bags that can withstand lower temperatures. Consider other features such as a snug-fitting hood, multiple zipper sliders for ventilation, and a stash pocket for small items.
Additionally, sleeping bags come in various shapes, including rectangular, semi-rectangular or "modified mummy", and mummy styles. Rectangular bags offer ample room to stretch out, while mummy bags are more snug to boost warmth and reduce weight. Semi-rectangular bags offer a compromise between warmth and roominess.
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Sleeping bag features
When choosing a sleeping bag, it is important to consider the temperature rating, size and fit, insulation type, and additional features.
Firstly, the temperature rating is a crucial factor, as it indicates the lowest temperature at which the bag is designed to keep you warm. However, it is important to remember that temperature ratings are based on an "average sleeper" and may not account for individual variations. Therefore, it is recommended to choose a bag with a lower temperature rating than the lowest expected temperature at your camping location. Additionally, look for features such as a snug-fitting hood, which can provide extra warmth, especially in bags designed for colder temperatures.
Secondly, consider the size and fit of the sleeping bag. It should provide adequate room for your body, allowing you to stretch out comfortably. The shape of the sleeping bag also plays a role in warmth and comfort. Rectangular bags offer ample space, while semi-rectangular or "modified mummy" bags provide a balance between warmth and roominess. Mummy bags, true to their name, have a snug fit, maximizing warmth by minimizing air space.
Thirdly, decide between down and synthetic insulation. Down insulation is known for its superior warmth and compressibility, making it ideal for lightweight backpacking. Synthetic insulation, on the other hand, is more affordable, easier to care for, and retains warmth when wet, making it suitable for damp climates.
Lastly, consider additional features such as zipper sliders that allow for ventilation control, stash pockets for small items, and stuff sacks for compact storage. A sleeping bag liner can also enhance cleanliness and provide extra warmth. Draft collars or tubes help prevent heat loss, and some bags have a durable water repellent (DWR) finish to protect the insulation from moisture.
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Camping vs hiking bags
When choosing a sleeping bag for hiking in Peru, it's important to consider the temperature rating, weight, and features that will enhance your comfort and warmth.
Firstly, let's talk about temperature ratings. Sleeping bags are assigned temperature ratings based on lab tests that simulate how a bag performs in different conditions. These ratings are useful for comparing bags, but they may not perfectly match your real-world experience due to various factors such as your metabolism, clothing, and environmental conditions. When choosing a bag, select one with a temperature rating lower than the lowest temperature you expect to encounter. For example, if you're hiking in Cusco, Peru, which is located at a high altitude, you'll want a bag that can withstand colder temperatures.
Now, let's discuss the differences between camping and hiking bags. Camping bags typically offer more room to move around and stretch out, often featuring a rectangular design. They can be quite plush and roomy, especially if you're car camping and don't have to worry about weight or packing constraints. On the other hand, hiking bags are designed to be lightweight, compact, and easy to carry in a backpack. They provide good thermal protection while being snug and efficient in terms of warmth-to-weight ratio. If you plan to use one bag for both camping and hiking, a lightweight backpacking bag might be a better option.
When it comes to features, consider the following:
- Zipper features: Multiple zipper sliders allow for easy ventilation adjustment. Look for anti-snag designs, such as zipper covers or protectors.
- Hood: A snug-fitting hood can make the bag much warmer, and they are more commonly found on bags with lower temperature ratings.
- Stash pocket: Some bags have a small zippered pocket for storing small items like a watch or lip balm.
- Stuff sack: A stuff sack helps compress the bag for easy storage and transport, but it's recommended to use a larger storage sack for long-term storage to avoid damaging the insulation.
- Sleeping bag liner: Using a soft liner inside your bag adds extra warmth and helps keep it clean.
- Draft collars and zipper baffles: These features help trap body heat inside the bag, enhancing overall warmth.
- Sleeping pad attachment: Some bags have a sleeve or loops for attaching a sleeping pad, ensuring it stays in place during the night.
- Pillow pocket: This feature allows you to stuff clothes inside to create a pillow.
In conclusion, when choosing a sleeping bag for hiking in Peru, opt for a lightweight bag with a temperature rating suitable for colder temperatures. Consider the various features that enhance comfort and warmth, such as zipper options, hoods, stash pockets, and sleeping pad attachments. Remember that you can always unzip the bag if you get too warm, so it's better to err on the side of a lower temperature rating.
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Sleeping bag liners
When choosing a sleeping bag for hiking in Peru, it is important to consider the temperature rating, weight, and shape. The temperature ratings are based on an "average sleeper" and allow you to compare bags against each other. If you plan to hike in colder months, consider a bag with a lower temperature rating than the lowest expected nighttime temperature. A bag with a tight hood and multiple zipper sliders can help retain warmth and adjust ventilation. Additionally, a lightweight and compact bag is ideal for hiking and backpacking.
Silk sleeping bag liners are a popular choice due to their lightweight and breathable properties, making them easy to pack and providing comfort in rugged outdoor conditions. They can also help extend the life of your sleeping bag by keeping it clean. Other options include Tencel, silk blends, thermal boost, and moisture-wicking liners, which are ideal for warm and humid conditions.
When choosing a sleeping bag liner, consider your specific needs and preferences. Liners can add warmth, so if you plan to use them in colder conditions, look for thermal options. Additionally, comfort is key, so select a liner that feels soft and comfortable against your skin. Some liners are machine washable, making them easy to care for.
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Sleeping bag shapes
Sleeping bags come in a variety of shapes, each with its own set of advantages and disadvantages. Here is an overview of the four most common sleeping bag shapes:
Rectangular
Rectangular sleeping bags are the most traditional and common type of sleeping bag. They offer ample room for both legs and arms to stretch out and move around, making them ideal for those who prioritise comfort over warmth. Rectangular bags can often be completely unzipped and used as a comforter or blanket. They are a good choice for warm-weather camping as they do not retain as much heat as other shapes.
Semi-Rectangular
Also known as a "modified mummy" or "barrel" shape, semi-rectangular sleeping bags offer a compromise between warmth and roominess. They come in a variety of shapes, all of which are generally more slender than rectangular bags, with a rounded top and a slight taper at the bottom. Semi-rectangular bags are well-suited for cool-weather camping when conditions are chilly but not extremely cold.
Mummy
Mummy-shaped sleeping bags are designed to boost warmth and reduce weight. They have a slim, snug fit that contours the body, and typically include a hood that can be cinched tight for added warmth. With this style of bag, you roll over with the bag rather than inside of it. Mummy bags are ideal for backpacking as they are lightweight and maximise heat retention, making them suitable for bitterly cold conditions.
Double
Double sleeping bags are designed for couples and are typically twice the width of a standard bag. They usually come in a rectangular shape, but can also be found in barrel and mummy shapes. Double bags often feature zippers on both sides for easy entry and exit. If you prefer to sleep with your partner, a double sleeping bag can be a cosy and convenient option.
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Frequently asked questions
The temperature of your sleeping bag will depend on where in Peru you are travelling to, and when. For example, the city of Cusco is quite cold, being 3,399m above sea level, but other cities in the north or jungle of Peru are warmer. The temperature will also depend on the time of year you are travelling, with the winter months being colder. A four-season (or -10°C) bag is recommended for the winter months. At other times, a three-season (or -4/-5°C) bag will suffice, although this depends on how sensitive you are to the cold.
It is important to consider the style of sleeping bag you will need. If you are hiking, you will need a lightweight, compact bag that offers good thermal protection. If you are camping, you may want a bag with more room to stretch out. Other features to consider include a hood, multiple zipper sliders, a stash pocket, and a stuff bag.
To keep warm in your sleeping bag, consider using a sleeping bag liner. This will also help to keep your bag clean. A tight-fitting hood will also make your bag warmer, and you can adjust ventilation using the zipper.
In addition to a warm sleeping bag, you will need a range of clothing and equipment to keep warm in Peru. This includes a brimmed hat and a winter beanie, warm clothing for the night time (such as a fleece, long pants, and gloves), and thermal underwear if you are trekking in winter or are sensitive to the cold.
