The sleeping bag is one of the most important equipment for your camping in the field. The sleeping bag can cut off the contact between the body and the outside world, so that the body heat is convected in the sleeping bag to keep the heat less loss of heat and the intake of food heat. Choose carefully down, fabric, craftsmanship, volume weight, price.
Try it at home after purchasing, make sure the sleeping bag is long and wide enough. Differences between the north and the south, personal physical fitness and other factors will make different people have different feelings about using a sleeping bag.
A sleeping bag is a sleeping bag. Adequate sleep can help us eliminate fatigue and restore physical strength. A sleeping bag with seasonal temperature and climate in the area you are going to. Generally, the temperature scale of sleeping bags is divided by 5 degrees.
The origin of sleeping bags is that people living in extreme conditions, such as Eskimos, are mostly made of animal skins.
Modern sleeping bags appeared with explorers and mountaineers in the early 19th century.
Then the use of cotton is said to have entered my country from the Northern and Southern Dynasties. Before, China only had kapok for pillows and mattresses, and there was no cotton that could be woven. Japan uses cattails as cotton.
Goose down is the time when Napoleon attacked Tsarist Russia. Soldiers spent their time in the cold regions of Siberia through the fowl's feathers in their military uniforms during the extremely cold period.
Synthetic fibers appeared after the Industrial Revolution.
There are many kinds of internal structures of sleeping bags, which are generally divided into two categories.
One is the vertical lining structure (divided into multiple categories, triangular parallel...)
One is a needle through the structure.
One stitch through is the mechanism of the ultra-light down jacket. One layer, one layer, the suture is directly sewn on, forming a down down path, and it is enough to pack down. One stitch of sewing thread will have less thermal insulation effect.
The other is the vertical lining. In fact, many sleeping bags on the market have a parallel vertical lining structure.
Specifically, each square meter of knitted mesh fabric forms a three-dimensional down path, so that the down is fully fluffy.
How to make down fully fluffy? It is necessary to know the volume of the down filled on the surface. This volume can be calculated by the number of grams of the filled down. The down unit is the bulkiness.
Bulkiness, fluffy is an important indicator for measuring the warmth of down in the world, which refers to the value of cubic inches of volume occupied by each ounce (30 grams) of down under certain conditions.
There are generally two kinds of fillings for sleeping bags (one of fleece): one is chemical fiber cotton and the other is down.
Chemical fiber cotton has good moisture resistance, maintains warmth in wet conditions, and has a low price, but it is bulky and has a short service life.
The fabric of the sleeping bag: directly affects the durability and comfort of your sleeping bag and even moisture resistance.
Nowadays, outdoor sleeping bags are mostly made of synthetic materials, polyester and cotton materials.
The professional sleeping bag fabric will be coated with high-density fabric 310T, which can prevent tearing and block moisture. The feel and comfort are top tier.
Down sleeping bags are divided into duck down and goose down. Under the same conditions, the warmth retention of goose down is slightly higher than that of duck down.
The amount of down filling, the net content of filled down.
The down content is composed of feathers and down. The feathers have a supporting effect, and the heat preservation comes from the fine down.
Bulkiness, bulkiness is an important indicator for measuring the warmth of down in the world, which refers to the value of cubic inches of volume occupied by each ounce of down under certain conditions.
Down sleeping bags are warm, easy to squeeze, easy to keep original, expensive and easy to absorb water.
The shape of the sleeping bag:
Common: mummy envelopes strips
Mummy (Mommy):
The mummy style is borrowed from the shape of the coffin of the ancient Egyptian pharaohs. It conforms to the human body curve, the legs are narrow and the shoulders are wide, and a head pocket fits the human body with good thermal insulation effect. Suitable for use in cold seasons. Some mummy sleeping bags are thickened at the bottom and feet.
Envelope type: long strip type: mostly used in summer, fleece or synthetic fiber cotton, which is diversified in use and convenient to carry. Chemical fiber cotton is selected in rainy areas above minus five degrees, and the down sleeping bag will bring a lot of trouble to users when it gets wet. Because it is used in a warm environment without the tight fit of the mummy, it loses some insulation, volume, and weight, but the comfort is improved. There is a pocket on the head, a rope collection, and a straight barrel design. Open it can be used as a stand and two mats can be spliced together.
Try to take off your coat before going into the sleeping bag to help heat up quickly and improve comfort. Choose a slightly larger sleeping bag to put your dry coat in, which is convenient for getting up in the morning and wearing warm clothes.
Sleeping bag temperature scale
Sleeping bags have a label that says comfort temperature and limit
The lowest temperature standard: refers to the lowest temperature limit used by the sleeping bag. You will not be in danger of life at this temperature. If it is lower than this temperature, it will be dangerous, but it will not guarantee that you can sleep well. It is also related to your physical constitution.
Comfort: Refers to the most comfortable ideal temperature for the sleeping bag to allow you to sleep comfortably.
Maximum temperature: refers to the upper limit of the temperature range, above this temperature, the user will be unbearably hot.
When you're choosing a sleeping bag, it's best to stick to low-end temperatures.
Sleeping bags can be combined with fleece for personal hygiene, easy cleaning and help with heat convection. Increase the temperature value.
There are several designs to consider when choosing: the head design of the sleeping bag, zipper, chest collar, chest thickening, stitching, pockets, packaging.
Sleeping bag storage and cleaning
After getting up in the morning, after a night of breathing, a certain amount of water is discharged from the body. The sleeping bag should be ventilated and dried to prevent mildew, keep it fluffy and warm, and has the effect of sterilization, avoiding strong sunlight and accelerating the aging of the fabric.
When you don't need a sleeping bag, hang the down sleeping bag in a dry and cool place at home and expand it freely. Because prolonged compression in the bag will compress the feathers or fibers, it will take a long time to restore the bulk.
Synthetic fiber and fleece sleeping bags can be washed directly. Down sleeping bags are generally not washed once in a few years, do not over-wash, and mostly use sleeping bag cleaner and rag to wipe the dust in the sun. Wash the head, neckline, and parts of the feet that are easily soiled. Hold up the sleeping bag completely after washing it thoroughly. In fact, it can be equipped with an outdoor special cover and inner tank.