"Warm card, charcoal card, heat card, color Ram ... ..." These sounds weird name, has recently been used by many companies to promote thermal underwear fabric. In the west of a mall, "should be cool," underwear counters to "Lycra" as a selling point; Huatian Jiao launched soybean skin benefits "warm card" underwear; Arctic cashmere thermal underwear to sell "charcoal" underwear. A salesperson introduction, "Lycra" is a kind of elastic fiber, put on very comfortable and warm, "charcoal" is also a kind of fiber, but inside the charcoal ingredients, thermal effect is better than ordinary thermal underwear. A set of "warm card" marked thermal underwear price of 250 yuan, "charcoal" underwear price of 360 yuan, more expensive than ordinary cotton thermal underwear more than 100-200 yuan. A member of the public who is buying says Lycra knows, but never heard of warm cards, charcoal cards, heat cards, and found it very strange. Only after salesmen explained that this is the name of the new fabric. The function of a new generation of thermal underwear has also been more extended, in addition to thermal features, the body sculpting, health skin care and green features such as new features have also been introduced into the thermal underwear. A salesperson said the new thermal underwear, which combines body sculpting and warmth, is particularly popular with Ms. Amy, who sold more than 20 sets this weekend like a bamboo-fiber sculpting underwear. However, Xu Jian, secretary general of the National Garment Standardization Committee, said that these "cards" are essentially fibers made of polyester, nylon, acrylic and other special processing technologies. "Warm Cards" and "Hot Cards" are acrylics, "Polyester," Magic Card "is a flexible spandex. Acrylic fiber, also known as cashmere, fluffy soft, good elasticity, resistance to sun, heat, but hygroscopicity is not good, easy to bring the feeling of hot and uncomfortable, but also poor wear resistance; spandex good elasticity, No ironing, but hygroscopicity is not good enough; polyester fiber is synthetic fiber synthetic fibers, the surface is smooth, fine linen feel, with good flexibility and durability, but it has static electricity and hair ball problems, almost Water, not easy to clean with water. Zhejiang Consumer Protection Committee reminded, according to the relevant provisions of underwear fabrics are actually "natural fiber" and "man-made fibers" two. In the purchase of fabric underwear to find out what kind of fiber, to buy more suitable to their thermal underwear.