Can tight thermal underwear keep warm?

In winter, various thermal underwear advertisements occupy the screen to promote various effects. Many people are eager to buy at high prices. So does thermal underwear really keep warm? The answer is amazing. Let's take a look at it.

We know that good blood circulation is an important means of maintaining a constant body temperature. Therefore, we often suggest that you soak your feet in hot water every day before going to bed in winter to help promote blood circulation. So, in the same way, tight underwear because too close to the body, very easy to oppress the subcutaneous blood vessels, blocking the circulation of blood, so, not only did not play a role in warming, but also hindered the body's own heat production.
It may not be as simple as we think. The most comfortable temperature of the human body is its own temperature. When the body temperature warms up the clothing, the heat will continue to spread out. In winter, we can help keep warm by wearing a lot of clothes. Because in the interlayer of each garment, there is a constant convection of cold air from the outer layer and warm air from the inner layer. In the process of layer-by-layer convection, heat is ensured not to be emitted in large quantities. Even if we wear thick tight underwear, it not only affects the blood circulation of the human body, but also squeezes out the first layer of space between the human body and underwear, which is equivalent to artificially squeezing out a layer of convective space for warmth preservation.
Therefore, tight thermal underwear not only does not keep warm, but also may cause body cold!

Of course, now many thermal underwear is also adding some technology content, not only close to the beautiful, but also said to prevent heat dissipation. So is this thermal underwear perfect? For sweaty buddies, such underwear may not be for you. Underwear with the function of preventing heat dissipation is also easy to cause sweating. Sweat contains urea, salt and other ingredients. When these ingredients are attached to the body surface and warm underwear, it is easy to cause skin allergy, itching and other problems.

Therefore, when choosing thermal underwear, the first is not too tight; secondly, choose pure cotton material as far as possible, not only to keep warm and cold, but also not easy to cause skin itching or even allergies when contacting with large areas of the skin. Especially small partners of dry skin, do not choose thermal underwear made of chemical fibers, because chemical fibers are prone to generate static electricity, which reduces skin moisture and increases skin debris.

Therefore, cotton underwear, or winter's first choice!