First, technical parameters:
Temperature scale, comfort temperature scale on the sleeping bag usually indicates the temperature range, and some are equipped with color bars. From red to green or blue, give a chestnut. Red starts at 5 degrees, then turns to light green at 0 degrees, and dark green at -5 degrees. The significance of this temperature representation is:
If you use this sleeping bag more than 5 degrees, you will feel very hot,
0 degrees is most comfortable to use,
Below -5 degrees, you will feel cold.
The middle 0 degree is called the comfort temperature scale. The -5 and 5 degrees on both sides are called extreme temperature scales. However, this temperature scale is only for reference. It varies from person to person and from environment to environment. Generally speaking, the sleeping bags of European and American origin are relatively accurate on the temperature scale, and many of the domestic sleeping bags' temperature scales are irresponsible.
There are two main types of sleeping bag fillings, down and cotton, as well as single-layer fleece sleeping bags.
Down sleeping bag: It is divided into white duck down and goose down. Under the same conditions, the warmth of goose down is higher than that of duck down, and the price is much more expensive.
Sometimes the market will find particularly cheap down products (mainly in a real estate in Hebei), such as 100 yuan a down jacket, 150 yuan a duck down sleeping bag, such products are generally not optional. Because there are two indicators that ordinary people can't inspect on the spot: fluffiness and cleanliness.
The same down also divided 60 down 70 down to 90 down and so on. 90 fleece means that the content point of down is 90%, and the rest of the filling material is other materials. There are many types and the quality varies. Four-hole cotton and seven-hole cotton, the so-called "hole" number, there is no way to be elaborate, as with various chemical fiber filling sleeping bags, with the increase of the use time, the thermal performance will slowly decrease until it cannot be used, but they have no down sleeping bags One of the advantages is that it can still retain a part of the warming performance after being wet, unlike the down sleeping bag that is not warm at all once it is wet. Fill density is expressed in grams per meter square, such as 300 grams / meter square, 350 grams / meter square. Compared with down and cotton fillings, down has a higher degree of warmth and can be lightweight under the same degree of warmth; cotton has a relatively low degree of warmth, a large packaging volume, and poor compressibility; wet down will lose almost all of its ability to keep warm, and It is not easy to dry, so under the severe mountain climbing environment, materials with waterproof and breathable properties are often used as the outer material of down sleeping bags. Chemical fiber cotton has a certain water-repellent performance, maintains a certain warmth performance when wet, and has a fast drying speed; the use of down products Long life, good maintenance can be used for more than 10 years, while the life of synthetic cotton sleeping bags is only 3 or 4 years.
Fleece: The sleeping bag is sewn with fleece, which can be used alone as a summer sleeping bag or a sleeping bag liner. According to past experience, the warmth effect of a sleeping bag at -5 degrees and a fleece sleeping bag can reach about -10 ° C.
Sleeping bags have high requirements on internal and external materials, especially down sleeping bags. It is usually better to require more than 200T, because if the lining material index is less than 200T, the fluff will wear out. Some better sleeping bags often use good materials, so there is no phenomenon of fluffing out. This material feels when it comes into contact with skin soft;
External materials for sleeping bags: Good sleeping bags mostly use waterproof and breathable materials to ensure that the sleeping bags are dry. As the sleeping bag is not easy to dry once it is wet, it will lose its thermal insulation performance, so it is necessary to use waterproof and breathable materials as the outer fabric.
Second, appearance classification
Common sleeping bags come in 2 shapes, mummy and envelope. Mummy style is also called mummy style. Mummy sleeping bag has wide shoulders and narrow feet. The shoulder width is generally 75 to 85CM, and the foot width is 35 to 45CM. Mummy-type sleeping bag is the shape of a sleeping bag that can achieve good warmth under the same weight, suitable for use in cold seasons. Envelope-type sleeping bags are as wide as their names, with shoulder cloth and feet as wide as an envelope. Such sleeping bags are more loose, suitable for summer and large People.
Sleeping bag packaging
Most manufacturers' sleeping bags have compressed packaging bags when they leave the factory. It can also be purchased separately. Usually a waterproof material.
Third, the storage of sleeping bags
Whether it is a down or cotton sleeping bag, when not in use for a long time, try not to compress it and keep it as fluffy as possible. Proper sun exposure is a good method. The purpose of this is to maintain the fluffiness of down and cotton and extend the service life.