Thermal underwear and the principle of its operation

Thermal underwear is a functional underwear, the main purpose of which is thermoregulation, i.e. maintaining the optimal temperature of the human body in various environmental conditions. In addition to keeping warm, thermal underwear also removes moisture from the surface of the body (during active movement), provides ventilation and protection against overheating, which is important in summer. This is what distinguishes it from ordinary warm underwear.

«It is important to understand that thermal underwear does not heat by itself, but only retains the heat generated by your body. Thermal underwear differs from ordinary underwear in its better ability to accumulate heat between the skin and fabric, which minimizes heat loss»

The air contained in the linen, in contact with the body, is heated to a comfortable temperature. Thus, a protective layer of warm air is created between the skin and the cold external environment, the effect of keeping warm is obtained. Improved thermal insulation is achieved by using materials with low thermal conductivity (for ordinary linen it is wool, cashmere or silk, for thermal underwear — polypropylene, and sometimes polyester) and air content in fibers and fabrics (for example, hollow fibers Termolite, Meryl Nexteen, Softprim, fabrics with air microsinuses, etc.).

The second task of a thermal suit is to remove moisture. It is known that during active human activity (sports, outdoor activities, intense physical work, and sometimes just walking), the skin begins to release a sufficiently large amount of moisture (sweat).

Such moisture, accumulating in the fabric of ordinary linen, sharply reduces its thermal insulation properties, creates discomfort and often leads to hypothermia and colds. We all know how uncomfortable it feels to be in damp clothes, especially in cold weather.

Thermal underwear is able to remove moisture from the surface of the body without retaining it in the structure of the fabric itself, always keeping the skin dry. To do this, it is made from special synthetic fibers that do not absorb moisture and do not retain it on their surface.

«At the same time, a protective layer of warm air between the skin and the external cold environment, due to the pressure difference, pushes vaporous moisture to the surface of the thermal underwear. The moisture (liquid) formed on the skin is brought to the surface by the thermal underwear due to the capillary effect»

Moisture quickly evaporates from the surface of the thermal underwear or passes into the next layers of clothing, up to the complete withdrawal to the outside. This reduces body heat loss in cold weather, allows for more efficient use of a person’s own heat, saves energy, maintains thermal comfort, prevents skin irritation and hypothermia.

Hygienic features of thermal underwear.

First of all, it should not cause allergies, as is the case with low-quality synthetic materials and, sometimes, wool. And since the use of thermal underwear is often associated with intense sweating, this function is even more important. It should also be taken into account that thermal underwear is often used in conditions that are far from comfortable, when clothing and even underwear are not uncommon. At the same time, the consumer does not have a sufficient amount of removable thermal underwear with him, and the possibility of bathing and washing is completely excluded for a long time. Therefore, good thermal underwear additionally has bacteriostatic or antibacterial properties, does not create conditions for the reproduction of harmful microorganisms, and prevents the appearance of unpleasant odors.

Thermal underwear will not necessarily have an exquisite design, however, it is very important that it is pleasant to the touch, elastic and fits the body well — this increases the efficiency of moisture removal and thermal underwear does not hinder movement during active physical exertion. Sufficient elasticity is provided by the presence of special fibers Spandex (r), elastane, Lycra (r) in the composition of fabrics for thermal underwear. In addition, underwear should be made using special flat seams that do not rub the skin.

Thermal underwear can be made of polyester, polypropylene, wool, cotton, or a combination of both. Depending on the proportions of the content of these components, thermal underwear acquires certain properties and receives a different purpose.

With intense physical exertion and fairly low temperatures, both properties of thermal underwear are necessary — heat retention and removal of excess moisture from the skin surface. The modern high-quality Turkish thermal underwear of the Warm Winter brand successfully copes with this task. This is achieved through the use of innovative materials and technologies.

Main advantages:

· Anatomic cut;

· Flat seams;

· Good warming properties;

Pleasant to the body, does not cause irritation;

· Easy washing and quick drying;

a wide range of sizes;

· Low price.

We recommend purchasing a thermal kit in our store at