The different forms of sleeping bag and use
Generally, there are three types of sleeping bags:
- The sleeping bag “cover”
- The sleeping bag shaped egg
- The mummy sleeping bag
The sleeping bag “cover”
The sleeping bag “coverage” usually offers a very decent sleeping space and is thought to summer temperatures. It opens fully and rectangular shape allows it to serve as a cover, hence its name!
The sleeping bag shaped egg
The sleeping bag shaped egg is a good compromise between warmth and space.With its oval shape, you will not be cramped at the knees and shoulders. It is tighter in the feet, part where the temperature should be more regulated.
The mummy sleeping bag
The mummy sleeping bag is suitable for very low temperatures. Indeed, its shape gives it exceptional insulation properties. This sleeping bag hugs body shapes, in addition to being lightweight and compact. To enjoy the full benefits of the mummy sleeping bag, it is important to choose the right size.
Buying criteria: sleeping bag
Since 2005, the European standard EN 13537 indicates the temperature of use sleeping bags. This must always be indicated by the manufacturer. To measure this range, manufacturers test their sleeping bags in certified laboratories. There are three different thresholds: the threshold “comfort” the
- Comfort: threshold at which an “average woman” (25 years, 60 kg, 1.60 m) can still sleep in relaxed position without cold
- Limit threshold at which an “average man” (25 years, 70 kg, 1.73 m) can still sleep in fetal position without cold
- Extreme: threshold at which an “average woman” (25 years, 60 kg, 1.60 m) can still be protected from hypothermia. This threshold is very critical!
When purchasing a sleeping bag, it is advisable to take the comfort index as a benchmark. In some situations, the use of a floor mat is not enough to ensure sufficient heat inside the sleeping bag. The most insulating floor mats are thermoformed mats. We must be vigilant at temperatures below zero: condensed water can freeze the floor mats and cause it to lose its insulating effect.
Choosing the right sleeping bag size
If you go camping in cold regions, it is essential that you choose a sleeping bag perfect for your height. In a sleeping bag too narrow, one quickly feels uncomfortable and if you can not you move in, you may get colder. The same logic applies to sleeping bags too big: the unoccupied space quickly fills with cold air. One can possibly solve this problem by filling the cavities with unused clothing, but nothing beats a suitable size.
Hood and warmth collar
Since man loses almost 30% of body heat through your head, the presence of a “hood” at the top of the sleeping bag can be particularly useful. Some sleeping bags also possess anti-cold padded collar to surround the neck and prevent warm air out.
On the quality of sleeping bags, zippers are covered with a protection so as not to be directly in contact with the body and to ensure a good insulation. Many sleeping bags models have a zipper on the side. Here are some tips to guide you in your choice:
- If you have two sleeping bags of the same model, you can engage the right zip one with zip closure left the other to get a double sleeping bag.
- For those wishing to bring a sleeping bag and bivy bag, it is advisable to focus on right zippers.
Down or synthetic fibers?
Down is definitely the most comfortable type of padding. Compared with synthetic fibers, fluff better regulates the temperature. It is much more pleasant it is hot or cold. In addition, the down sleeping bags are much lighter and more compact: they take up less space when folded When purchasing a sleeping bag with down padding, you have the choice of fluff! duck and goose down. The goose down provides more heat, but is also more expensive. The inside of the sleeping bag is generally composed of a mixture of down and feathers, which must be indicated on the label by the fabricant.Voici the different possible combinations:
- Padding 90/10 = 90% down, 10% feathers
combination lightest and warmest – however, this type of down is not bear the high humidity. It requires the use of a quality floor mats.
- Padding 80/20 = 80% down, 20% feathers
Heavier than 90/10 and less insulation but little sensitive to moisture.
- Padding 70/30 = 70% down, 30% feather
Featherweight, which takes warm – more than a sleeping bag in synthetic fibers.Very comfortable and durable.
The main advantages of synthetic fibers in relation to down:
- Fast drying
- reduced compression. This implies that there is always a large padding layer under the body, so that it becomes thinner over time with the paddings of down because of the compression
- Synthetic fibers are cheaper than down (but also have a shorter lifespan)
Especially in the tropics, down sleeping bags easily attract microbes and moisture. In this region, the sleeping bags synthetic fiber are more suitable.
Exterior materials Fabrics nylon and polyester
In a night, the man lost between 250 and 500 g of water, which is ideally discharged to the outside by the sleeping bag. To seal the fabric to feathers, you have the cylindrer very tightly (and use a special cylinder). This method stiffens the fabric.Over the final fabric is tighter, it must be cylindered. The contact surface remains soft.
Most manufacturers offer vintage sleeping bags, the outer part consists of the following:
- Nylon (lightest)
- polyester (most comfortable)
- micro-fiber cloth (insulates well from cold and is water repellent, heavier than nylon)