1. Derong underwear In order to better keep out the cold, there are many different kinds of warm clothes on the market. I don't know when a velvet craze swept the whole market, and many companies and networks were promoting the warmth and comfort of velvet underwear. So many parents and children will choose velvet underwear in winter, which is very comfortable to wear. However, this kind of velvet fabric warm clothing is purely an IQ tax. It is ok for adults to wear it. Never give it to children.

First of all, the biggest feature of Derong thermal underwear is that it is airtight and does not absorb sweat at all. It is also ok for children who are in love and sweating. If children like to sweat, Derong underwear doesn't absorb sweat at all, it's all on the body. This taste is unpleasant. Secondly, Delong is an acrylic yarn brand produced by Bayer Company in Germany. The material of Delong, no matter how boasted, is also a kind of chemical fiber, which is very harmful to the body, especially when it is used as underwear, the fiber components are easily absorbed by the body, which will cause great harm to the body in the long run.

Second, the cute pattern of hot hand warmers, small palms, cheap prices, and the characteristics of heating when pinched, attracted the attention of many girls. But to be honest, this thing is still quite dangerous.

Its structure is very simple, that is, saturated sodium acetate solution with a small piece of iron, when a piece of metal is broken, the stability of the solution is destroyed, thus triggering the exothermic process of curing.

Theoretically, this is not a problem. The problem is that its fever range is 40 to 60 degrees, while the high temperature burn range of human body is 45 to 50 degrees. If it exceeds 60 degrees, it will cause more damage.

Many merchants say that this hand warmer can be used repeatedly. But after practice, it is not easy to use it again.

First, you should pour a pot of boiling water into it until all the liquid in it melts, and then take it out and let it cool naturally. The key is that the success rate of its recovery is still extremely low.