It’s easy to become obsessive when trying to choose the “right” sleeping bags. It is a balance between
having enough insulation to keep you warm at night but not too heavy to carry around. So taking the time to choose sleeping bag for trekking or hiking for you is time well spent.
So what is a trekking or hiking sleeping bag?
A trekking or hiking sleeping bag is generally
- Lighter than a camping sleeping bag
- Pack down smaller than a camping sleeping bag
- Higher cost because of the requirement to provide warmth, reduced size and weight
So what is an Alpine sleeping bag?
Choosing an alpine sleeping bag is not dissimilar to choosing a sleeping bag for trekking. Needs to be light weight, provide added focus on warmth and water resistance.
In order to provide the lightest bag whilst providing additional warm Alpine bags do come at a higher price. Their shell materials will also often feature waterproof/breathable membranes and water repellent coatings to deal with increased moisture levels.
Kinds of insulation
A sleeping bag traps air and keeps it from circulating. This “dead air” around your body is warmed by the heat created by your body’s metabolism. Remembering the bag forms a barrier between this air and the colder ground or outside air. Smaller spaces warm up faster and retain heat more efficiently.
When choosing a sleeping bag for trekking or hiking there are two different types of fill, Synthetic and Down Fill. Down Fill are feathers from geese and ducks.
Downfill insulation is more expensive than Synthetic, its lighter and more compressible. It is also more durable and provide greater warmth. Typically the high level of Downfill in a bag the more expensive the bag (visa versa).
A note about ethical down: Most brands take steps to monitor the treatment of ducks and geese that provide down. You can identify a bag from one of those manufacturers when you see it labeled as either RDS (Responsible Down Standard) or TDS (global Traceable Down Standard). To learn about what goes into those standards, read Animal Welfare and Outdoor Gear.
Synthetic insulation offers solid performance at an affordable price. Unlike down, it continues to insulate when wet, so it’s the bag of choice for damp climates.
Downfill versus Synthetic
|Insulation Type||Key Benefit|
Easy to compress
Excels in cold, dry conditions
Insulates when wet
Because waking up shivering is a terrible experience, it is best to have a sleeping bag which will keep you warm. If you have a reasonable idea of what temperature you will be sleeping in, you can pick a bag based temperature ratings.
How are they rated?
In the past manufacturers test their own sleeping bags using a variety of methods. The sleeping bag industry solved this by agreeing to industry standards, however not all manufacturers use or rate their bags.
The EN (European Norm), was the original standard adopted by the sleeping bag industry. Today, a new entity, the ISO (International Standards Organization), oversees bag testing, but the method is almost identical to the EN bag test. (Because ISO testing is so similar to EN testing, you can compare your old EN-rated bag to a newer bag that sports an ISO temperature rating when you shop.)
The standard measures 3 temperature ratings:
Comfort – the temperature at which a standard woman can expect to sleep comfortably, without feeling cold and in a relaxed position.
Lower Limit – the temperature at which a standard man inside the bag sleeping in a curled position is starting to feel cold but not shivering, this is the limit of performance for the sleeping bag.
Extreme – at this temperature anyone can expect to feel particularly cold and there is a risk of hypothermia. You should only use the sleeping bag in this range when it’s an emergency.
If you want to read more about the EN 13537 rating standards and validity, there is a paper from the Outdoor Industry which discusses in detail.
There are number of factors to consider when choosing a sleeping bag for trekking or hiking. Enough to make your head spin. However, taking the time to choose the right sleeping bag for you is time well worth spent.
My own experience I have found it difficult to find the perfect sleeping bag. Instead made some compromises that include going for a warmer sleeping bag and carrying a bag which is 20 grams heavier. For the simple reason I like to be warm and don’t like waking up freezing at 2am in the morning.