The textile industry produces more and more new types of fabrics and knitted fabrics. Among them, materials with heat-saving properties occupy a special place.
For a comfortable stay and active work in cold natural conditions, modern thermal underwear is used. The set can consist of a top and bottom or be made in the form of a one-piece jumpsuit. A complete winter clothing set should consist of three components:
- thermal underwear is worn directly on the human body. Undershirts, even those made of thin cotton jersey, worsen the properties of special underwear, so there is no need to wear them;
- The second layer is made of fleece or Polartek. It is voluminous, retains heat well, does not accumulate moisture, and promotes its evaporation;
- the windproof membrane fabric of the top layer of the set (in the form of a jacket, trousers or overalls) protects the body from the influence of the external environment, protects from wind and wet natural precipitation.
Reference! Thermal underwear also works in hot weather.Its functions are the same: remove moisture and, thanks to the air gap, create comfortable conditions. Only this time it cools, not warms.
What is thermal underwear
Most often you can find thermal underwear on sale in the form of long-sleeved T-shirts and leggings. There are three types of linen based on their purpose and composition:
- heat-saving - retains the heat of the human body, thanks to the special volumetric weaving of the material. The right combination of fabric properties - heat conservation and air circulation inside the cellular knitwear, the heat of the human body is retained, moisture is removed in the form of sweat. The composition of fibers in clothes with such properties is synthetic fibers plus natural ones (wool, cotton);
- Moisture-wicking thermal underwear is recommended for active activities (sports, hunting). The main task is to remove sweat out. 100% synthetics are used in production;
- hybrid - combines the properties of heat-saving and moisture-wicking thermal underwear. Such properties were achieved by combining two layers of different composition. The inner layer (100% synthetic) removes moisture to the outer layer, not allowing it to linger on human skin. The outer layer consists of natural and synthetic fibers, provides the heat-protective properties of the linen, and moisture evaporates from its surface.
More and more people are interested in the beneficial properties of heat-saving clothing. In the winter season, wearing heat-saving leggings under windproof trousers allows you to work comfortably outdoors for a long time.
The principle of operation of thermal underwear
Unlike ordinary underwear, this type of underwear retains the heat of the human body very well. Due to the cellular structure of the knitted fabric weave, there is an air layer inside the material.Thermal underwear in contact with human skin heats up to body temperature.
Moisture that falls on the inside of thermal underwear in the form of sweat is pushed out under the influence of the pressure difference between the heated air in the structure of the underwear and the colder air above its surface. This effect is only possible for materials with low hygroscopicity, since they are not able to absorb moisture.
Tips for choosing thermal underwear
To choose the right thermal underwear, you must first determine the conditions of its use. Which function is primary – heat conservation or moisture removal during heavy physical activity?
Lingerie should follow the human body, like a second skin. Because in those places where there are air pockets, moisture that enters in the form of human sweat is not removed, and heat is poorly retained. The most comfortable one can be called a jumpsuit. The clasp is located on the front part - from the neck to the groin and can be made with a zipper or buttons.
Important! For proper functioning, it is very important to keep this type of underwear clean. Particles of sweat penetrating the structure of the material cause thermal underwear to lose its valuable heat-protective properties. Materials containing natural fibers do not tolerate aggressive detergents and bleaches. The recommended washing temperature is low, up to 40°.
Kits using natural bamboo and soy fibers have bactericidal properties. According to the results of scientific research, 70% of bacteria from human sweat die when they get on the surface of bamboo fibers. Soy fibers give fabrics a softness comparable to natural silk. The substances contained in the fiber rejuvenate the skin.This is due to the deodorizing and antibacterial effect of wearing clothes containing these fibers.
New developments are successfully used in industry. Modern thermal underwear brings comfort and convenience to a person’s life, allowing them to engage in active sports and hunting without being distracted by the discomfort of poorly chosen clothing.
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