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In addition to the emergence of new terms, a group of thermal underwear produced gold mink, milk, bamboo charcoal, platinum velvet, diamond velvet and other signs, which looked very valuable.

A price of 199 yuan of milk bamboo charcoal platinum velvet underwear, the label said the material is milk protein fiber, from natural milk, rich in 17 amino acids, has excellent thermal insulation.

But look at the fabric table, mostly cotton, polyester fiber, regenerated cellulose fiber, acrylic fiber and other materials.

The relevant staff of Hulun Buir Quality Supervision Department said that there are 5 kinds of textile materials used for clothing, namely cotton, wool, silk, hemp and chemical fiber. The acrylic fiber, called Japanese salad, is actually a kind of chemical fiber. It is extracted from petroleum, and its properties are similar to wool. But the price is relatively low. It is doubtful whether camel's hair and gold mink's fleece are real. These animal fibers, which are used as textile materials, are very few.