How to dress healthily in summer? Silk is the most skin-friendly and UV-proof.
Among many materials, silk is the lightest and most skin-friendly, so it is the most suitable summer material for everyone. Ultraviolet rays are the most important external factors that lead to skin aging, and silk can protect human skin from ultraviolet rays. Silk will gradually turn yellow under the irradiation of ultraviolet rays because it absorbs ultraviolet rays from the sun.
In addition, natural fibers such as cotton and hemp have excellent cooling function. Cotton and linen are popular summer clothes. No matter what kind of natural fiber, fine twisted yarn or woven cloth, it is generally dry to the touch, light in weight, better in ventilation effect and cooler to wear.
In addition, whether clothes are cool in summer has a great relationship with their hygroscopicity. According to the measurement, when the temperature is 24 degrees and the relative humidity is about 60%, the moisture absorption rate of silk is about 10%, that of cotton is about 8%, and synthetic fiber is the worst, generally less than 3%.
Red clothes are the most sun-proof.
In summer, people usually like to wear light-colored clothes, which makes them feel fresh and cool. I don't know that light-colored clothes are cool, but they can cause skin cancer under long-term ultraviolet radiation, especially dazzling white cotton clothes, which often contain fluorescent whitening agents and reflect harmful light to people's unprotected faces. On the contrary, dark clothes such as red or navy are much safer.
The worst sunscreen effect is light yellow cotton fabric, whose SPF is only 7, and the sunscreen effect drops to 4 after soaking. In view of this, scientists suggest that people should change the habit of wearing light clothes and wear dark chemical fiber fabrics when going out in summer when ultraviolet radiation is relatively strong.
You can change a slightly larger bra in summer.
Many women have personal experience, and it is easy to feel bloated in summer. This is because the structure of human breasts is mostly fat, and the rest are mammary glands. But any place where fat accumulates will help the human body to dissipate heat. Therefore, in summer, the breast may dilate blood vessels to help dissipate heat, and the breast size will change accordingly.