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How to buy a sleeping bag

When the cold wind whistling night, you tired to camp in the mountains, what do you need most at this time? Yes, a hot dinner, there is enough warm sleeping bags. The main function of a sleeping bag in camping is to keep warm, and in some cases it can also be used as a sanitary sleeper.

The main indicator of a sleeping bag is the temperature scale, also called comfort temperature. Comfortable low temperature means that most people feel comfortable using the sleeping bag when the outside temperature drops to a certain temperature, and if the temperature drops further, it will feel cold. Comfortable low temperature There are two kinds of identification methods on the sleeping bag, one is to identify an absolute temperature, for example, -10 degrees, indicating that the comfort temperature of the sleeping bag is -10 degrees; one is the marked temperature range, transition from red to green or blue For example, red begins at 5 degrees, transitions to light green at 0 degrees, and dark green at -5 degrees. The meaning of this temperature is: 5 degrees of warm, 0 degrees of suitable, -5 degrees feel very cold, the comfortable low temperature of this sleeping bag is 0 degrees. It should be noted that comfortable low temperature is only a relative concept. Sleeping bag products do not have industry associations, there are no industry standards, there are no domestic ones, and foreign ones do not. Some big brands and research institutions calibrate their products based on laboratory tests and field experience. Comfortable low temperature. This temperature only has reference value. He will vary from person to person and from environment to environment.

We examine the sleeping bag from these factors: the texture and weight of the filler; the texture of the inner and outer materials; the functional design; the packaging and accessories.

Filler

Sleeping bags are mainly filled with two kinds of down and chemical fiber cotton, in addition to a single layer of fleece sleeping bags.

Down is divided into duck down and goose down, under the same conditions, the degree of warmth of goose down is slightly higher than that of duck down. There are three main performance indicators down: the first indicator is the fill weight, such as 400 grams of goose down sleeping bag, 1100 grams of duck down sleeping bag, this weight is not to say the weight of the sleeping bag, twenty fingers filled down the net weight; the second indicator is containing cashmere The amount of down is composed of a pair of pinnacles and velvets. The pinnacles have a supporting effect and the warmth is mainly from the fine velvet. The cashmere content is expressed as a percentage. For example, 80 cashmeres means that the content of the cashmere in 100 weight units is 80 units. Duck down generally has a maximum cashmere content of 85 to 90, and goose down has a cashmere content of 90 to 95. The third indicator is the degree of velvet expansion. Fill power refers to how much an ounce down feather is under 68.4 grams of pressure. Cubic inches, the higher the degree of expansion of the down, the better the warmth of the velvet. Generally, the expansion degree of domestic duck down is about 450, and the expansion degree of domestic goose down is from 450 to 600. The Andean mountain goose down imported from the United States contains about 95 tons of velvet and the highest degree of swelling is 700 to 800. Among the several down sleeping bags sold by Sanfu Company, the JWS sleeping bag is a 400 gram 85 duck down, the SKF SUPER400 is an imported 700 goose down that is 700 swell, the SKF SUPER700, the SUPER1100 and the SUPER1300 are made with the best 90 goose down, and the swell 600 degrees. .

On the market sometimes find particularly cheap down products, such as 100 yuan a down jacket, 150 yuan a duck down sleeping bag, such a product is generally not optional. Because down there are two indicators that are generally not available for on-site testing: oxygen consumption index and cleanliness. Downs need to go through a number of professional cleaning procedures. Some small traders will finish the primary downs a bit and clean them up to make finished products. These products cannot be used at all. The simple method of identification is to tap the finished product with a wooden stick and there will be dust leakage. Smell smells odor, if cleaning, there is odor in the water. Down is a high-quality product, and we hope you will buy a really good product.

There are many types of chemical fiber cotton, and the quality is poor. The most common spray cotton, to the four-hole cotton, seven-hole cotton, 3M cotton, POLARGUARD 3D / HV cotton and so on. The packing density is expressed in grams per square meter, for example 260 g/m2 and 320 g/m2. The Sanfu series of camping sleeping bags use four-hole cotton from Taiwan. The nominal comfort temperature of 320 g/m2 is -3 degrees. The same thickness of DuPont's seven-hole cotton sleeping bag comfort temperature of up to -9 degrees, POLARGUARD warmth function is similar.

Comparing downfill and chemical fiber cotton fillers, the down warmth is higher, the weight can be achieved lightest under the same degree of warmth; chemical fiber cotton is relatively warm, the packaging volume is large, and the compressibility is poor; the down feather is expensive, the chemical fiber cotton is cheap; down Humidity will lose almost all of its ability to keep warm, and it is not easy to dry, so under harsh hiking environment, materials with water-breathable breathability are often used as the outer material of down sleeping bags. Chemical fiber cotton has certain water-repellent properties and maintains certain thermal properties after being wet. And fast drying speed; long service life of down products, good maintenance can be used for more than 10 years, while the life of chemical fiber cotton sleeping bag is only 3 or 4 years.

The fleece sleeping bag is sewn with fleece and can be used alone as a summer sleeping bag or a sanitary sleeping bag. Can also be used in conjunction with other sleeping bags in the winter to enhance warmth. According to the time experience, a -3 degree sleeping bag plus a fleece sleeping bag can have a thermal effect of about -10 degrees.

Inside and outside materials

Ordinary cotton sleeping bags use polyester or nylon materials. Polyester nylon fabrics have differences in density and texture. Down sleeping bags require high internal and external materials, and it is necessary to ensure that nylon materials with a density of 230 T or more can be protected against fleece. Many domestic nylon fabrics are not dense enough to prevent fleece. Manufacturers use a coating method to prevent fleece. This is a very unscientific practice. Because the inner and outer materials of the down sleeping bag need to have good air permeability, the emitted moisture will accumulate in the sleeping bag, which will greatly reduce the warmth of down. High-weaving cotton or polyester/cotton can also prevent fleece, but it is heavy and has poor compressibility. It is generally not used in high-end sleeping bags. Sanfu's newly launched SUPER series of goose down sleeping bags, using high-density PERTEX materials imported from South Korea, in addition to a good anti-velvet effect, there is a certain water repellent function, TNF variety of goose down sleeping bags are using this material. SUPOR SUPER 1300 sleeping bags are made of high-grade waterproof and breathable materials, which can meet the corresponding level of snow mountain climbing activities.

feature design

The design of sleeping bags is also very important. Let's talk about appearance. There are three kinds of common sleeping bags, mammy type, envelope type and mixed type. Mammy is also called mummy or mummy. This kind of sleeping bag has a narrow shoulder width, a shoulder width of 75 to 85 cm, and a foot width of 45 to 55 cm. Mammy-style sleeping bag is the shape of sleeping bag that can achieve the best warming effect under the same weight, suitable for use in cold seasons; envelope-style sleeping bag as the name suggests, shoulder cloth and feet are as wide as an envelope, such a sleeping bag is relatively loose, suitable for the warm summer season And the wide body of people; the combination of the first two types of sleeping bags, the width of the foot is 55 to 65 cm.

Now international popular sleeping bags are small square hats, body streamlined type (the widest part is not in the collar, but in the shoulders and elbows). The previous big round caps both added weight and were not conducive to keeping warm.

Other functional design of sleeping bags:

Double puller zipper;

Zipper anti-entrainment (a thin, stiff PP tape on the inside of the zip prevents the zipper from eating cloth)

Zipper air release sandwich (cotton windproof sandwich inside the zipper to prevent cold wind from entering the zipper);

Chest collar (or collar cut off, tightening collar), tightened can be placed cold air from the neck into;

pocket;

Left and right zipper design, the same type of sleeping bag is divided into left and right zippers, can be combined into a double sleeping bag;

Sleeping bag size: L, M, S and other different numbers to facilitate different heights.

Sam Fu's CAMPER'S Sleeping Bag, TREKKER'S Sleeping Bag, etc., almost all of the above-mentioned functional design, and TREKKER'S back plus anti-slip strips to increase the friction with the mat; SANFO 3D sleeping bag soles, side and other places thickening, greatly increase the warmth degree. These excellent functional designs make Sanfu sleeping bags occupy an important market position in ordinary camping sleeping bags.

Packaging and accessories

Sleeping bags are packed in oxford compression bags, which can be large or small and durable. In the Sanfu sleeping bag, except for the relatively small travel sleeping bag and fleece sleeping bag, all other self-provided oxford compression bags. The accessories for sleeping bags are mainly zippers, buttons and ropes. To choose a sleeping bag, you must choose a zipper-quality sleeping bag.

How to choose, use and maintain sleeping bags

After the above discussion, you already have a more comprehensive understanding of sleeping bags. Before purchasing a sleeping bag, how many problems do you have? What kind of low temperature environment will I use for sleeping bags? How is my personal ability to resist cold? Am I concerned about weight? How much money do I plan to spend? After answering the above question, you have a basic range of choices, and then choose a business that is also reputable. It should be noted that if you only want to use a sleeping bag in an environment with a temperature above 0 degrees, you may wish to choose a lower temperature, such as -3 degrees or -5 degrees. If your cold resistance is weak, it is recommended that you also choose a sleeping bag with a lower temperature index. After all, it is much easier and safer for us to deal with warmth than to deal with cold.

When using a sleeping bag, be careful to keep it dry, because the warmth of the sleeping bag is greatly reduced, especially if the sleeping bag is down, it will not keep warm. Therefore, in heavy rain or water activities, protect the backpack from water, or seal the sleeping bag with a water bag in advance. After the sleeping bag is wet, it should be sun dried or air dried as soon as conditions permit. The wet down sleeping bag cannot be stored for a long time, otherwise it will become moldy and even change.

When using sleeping bags, there are several ways to improve warmth: 1 It is very important to have a mat with good quality. It is very important for people who frequent camping. If the coldness goes straight from the ground to the back, the kind of cold is unbearable. 2 is a cup of hot beverage before going to bed, milk, fruit can be, so that the body heat; 3 is a comfortable meal before going to bed to eat, especially to add carbohydrates (starch, sugar); 4 is to wear A long set of thermal underwear to drink clean socks can be very effective; 5 is when the sleeping bag is not warm enough to wear more clothes, or to cover the sleeping bag with clothes and other items; 6 is to squeeze more people with a tent 7 is to secure the gas in the tent or stove in the case of security; 8 is a pile of fire. With so many methods, try it at the key.

In addition, whether it is down sleeping bags or chemical fiber cotton sleeping bags, in the case of not using for a long time, try to save in a loose and free state to maintain the nature of down and cotton, to extend the service life, especially down sleeping bags, try to save in a dedicated down Sleeping bag storage bag (loose and breathable cotton bag). The last sleeping bag, as a close-fitting hygiene product, tries to avoid borrowing from each other.

Both chemical fiber cotton sleeping bags and fleece sleeping bags can be washed directly. If the washing machine is large enough, it can be machine washed. When doing the drying, try to tile or hang in order to avoid drooping. Down sleeping bag washing method: According to recommendations of feather experts, down sleeping bags can be cleaned once in about 4 years. The service life is about 10 to 12 years and it can be cleaned 3 times. If it is not too dirty, it can be easily cleaned, such as using a towel to stick petrol to clean the surface material. In outdoor sports, sleeping bags are often dirty and have more cleaning times. The cleaning method is as follows: Hand washing or professional machine washing. Hand wash with a special down detergent, rinsing can be, do not rub too much, do not twist. If you want to machine wash, please give it to a professional washing company. After washing, air dry or air dry. After confirming that it is dry, tap gently until it is naturally inflated and store it in a sleeping bag storage bag.

Down sleeping bag washing avoid alkaline detergent, avoid twisting, avoid fire drying. The down sleeping bag can be shared with the cotton sleeping bag liner to reduce the washing opportunities while the cotton sleeping bag is lined to help absorb sweat.

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