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Style: envelope type, rectangular shape, zipper is "L" type, can be fully opened. This kind of sleeping bag is more comfortable to sleep, but the cold resistance is worse, and it is mostly used indoors or in summer. This kind of sleeping bag has another advantage, because with a fully open zipper design, two sleeping bags can be combined into one double sleeping bag.

Mummy type, and in the mainland is directly translated as "mummy" also called "inexplicable" type, this type of sleeping bag is narrow and wide, zipper is usually half open, but there are individual designs are fully open.

The style of the sleeping bag is constantly improved during the use of people. In combination with the advantages of the above two kinds of sleeping bags, a variant sleeping bag has appeared. Some people call this new type of sleeping bag an "extended type".

Filler:

Polyester cotton sleeping bag filling materials available on the market include domestically-made, imported polyester cotton (including two types of sprayed cotton and cotton), imitated silk cotton, DuPont cotton, and POLARGUARD 3D cotton. Polyester cotton sleeping bags have the advantage of being less prone to moisture and are particularly suitable for use in wet areas. High-quality polyester cotton is better in warmth and breathability, but it is slightly less compressible than high-quality down sleeping bags.

Outer layer:

Most sleeping bags nowadays use water-repellent outer fabrics. Water does not immediately penetrate into the fibers but instead collects into water droplets. Sleeping bags using this kind of fabric, although not able to cope with heavy rain, cope with fog dew is basically enough. One thing you should bear in mind is that when the sun comes out, deep-colored fabrics are easier to dry. Therefore, we recommend that you buy darker sleeping bags when shopping.

Lining:

The lining of the sleeping bag is mostly made of cotton or purified fiber material (polyester or nylon). The biggest advantage of using cotton cloth in the lining is that the cotton cloth is comfortable and there is no static electricity, but it is relatively easy to get wet and the weight is heavy. The chemical fiber fabrics are prone to static electricity. In particular, many outdoor clothes are chemical fiber products. When they enter the sleeping bag at night, they are mostly electro-optically scintillating. Chemical fiber products are not prone to moisture, but prolonged exposure can make the skin dry. At present, many sleeping bags are made of polyester/cotton blends (the most commonly used are 65% polyester and 35% cotton. Such a blended fabric is easy to be worsted and is not prone to static electricity)

zipper:

In order to solve the situation of the zipper bite, some sleeping bags have been added with an anti-clamping treatment, such as using a zipper with an anti-pinch lining strip or being treated on both sides of the zipper of the sleeping bag to prevent the clip fabric.

If you are camping outdoors and have late night habits, we strongly recommend that you do not neglect this small detail when you buy a sleeping bag. Don't worry if your current sleeping bag doesn't have an anti-clamp design, and developing a good zipper habit will eliminate the occurrence of biting. The specific method is: the handle extends into the joint of the two zippers, the thumb and the index finger respectively pinch the zipper from the upper and lower parts, and pull the zipper.

Early sleeping bags were usually single-headed zippers that could only be opened from top to bottom and closed from bottom to top. This was inconvenient. Secondly, it was impossible to adjust the opening of the sleeping bag to adjust the temperature. Later sleeping bags use double zips, so that the zipper can pull from both up and down directions. This will ensure that you can put your hot, smelly feet out through the air at night.

Sleeping bag processing method:

Currently sleeping bag processing methods can be divided into: single-layer type (such as: a needle penetrating through), double-layer, stacked tile type three.

The so-called one-shot penetration method is the simplest method of processing. During processing, the lining, filler, and outer material are stacked together and the three layers are stitched together. The needle eye of the sleeping bag processed by this process penetrates three layers, so it is called a penetrable penetrating type. The biggest drawback of this processing technology is that the uniformity of the cotton is not good, the filling material of the suture part is relatively thin, and the pinhole part is easy to ventilate, so this process is mostly used for processing some sleeping bags with relatively low grades or used indoors. .

The double-layer type is currently the most widely used one. During processing, the material is sewn together with a layer of filler and the fabric is sewn together with a layer of filler. Then the two layers of stitches are staggered together. This kind of craft is not very simple, but the sleeping bag is warmer, and will not be ventilated by the stitched eye.

The shingling type is the most complicated one in the processing technology. When processing, after the filling material is combed, it is cut into the prescribed small pieces, one end of the small piece is sewn together with the inner material, and the other end is sewn together with the fabric. This process has better warmth, breathability and strength, but the processing cost is much higher than the double-layer type, and is used in some high-grade sleeping bags.

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