Choosing the right sleeping bag
Essential accessory camper or hiker, sleeping bag must be perfectly adapted to the conditions in which you will use. The criteria on which to base your choice.
Choosing the right sleeping bag: form
There are two types of sleeping bags: wrap or cover sarcophagus.
- The blanket sleeping bag envelope: rectangular, it offers great freedom of movement, but at the expense of temperature outdoor air penetrates more easily.
- The sleeping bag sarcophagus: it is ideal for hiking. It is like a cocoon matching the shape of the body, including the face because the hood can be tightened with a cord. Some have an internal collar covering the shoulders and torso. Therefore no heat loss. In addition, it is somewhat less bulky. There are several sizes for each model, which adapts to the build of each.
Choosing the right sleeping bag: the trim
- The synthetic lining: it resistant to humid environments and is easy to maintain but is a bit heavier than that of down.
- The filling of down: it is the warmest, lightest, and often less cumbersome. However, if you plan to sleep under the stars, in a wet place, unless the army sleeping bags are equipped with a waterproof coating, feathers lose their loft and therefore their thermal capacity and insulation.
Choosing the right sleeping bag: thermal capacity
This is the most important because the goal is to stay warm! To locate you, know that there is a European standard: EN 13537. It provides 4 values corresponding to 4 types of outdoor temperatures and how a man or a woman (they react differently to cold) bear the once lying (e) in the bag:
- The maximum temperature Tmax or is one in which a man can sleep without being too hot. For example, if it is 20 ° C, this means that a man will bear the sleeping bag to an outside temperature of 20 ° C and that above, it will start to sweat.
- The comfort temperature or Tcomfort is when a woman (usually more sensitive to cold) will be comfortably installed.
- The temperature limit or Tlimit gives low limit: below the specified level, a man will begin to feel a cold sensation in the sleeping bag.
- The extreme temperature or Textreme: beyond this limit, even a woman lying in the bag may be hypothermic situation.
Based on these indications, the bags are divided into 3 main categories:
- Was the bags that provide good comfort between 22 ° C maximum temperature and maximum temperature of-1 ° C. They are very sufficient for camping on sunny days;
- bags 3 seasons with a cold which can withstand up to-10 ° C. They are suitable for backpackers sleeping in shelter;
- Winter bags which put the same shelter when the temperature drops to around-30 ° C. For true adventurers.
However, it can still bear some degrees less by providing it with a silk cloth or fleece ( “sleeping bag”), which is placed inside the bag or waterproof bag or on-breaker wind.
Choosing the right sleeping bag: Weight
The weight of the sleeping bag is important for hikers. In general, synthetic are heavier than duvets. And, in each category, lightness is a guarantee of quality.
Over a sleeping bag insulation, the heavier it is. Thus, a summer bag weighs 500 g (for a top down) to 1 100 g for a synthetic bag and a winter 1.5 kg to about 3 kg.
Choosing the right sleeping bag: closure
The zipper can be covered for better airtightness and / or self-locking for those who move a lot during sleep.
Provided you choose two compatible bags, it is possible to attach them together to get one down two places.