Category I: pure cotton underwear. The most traditional single-layer underwear is soft and breathable, but due to its thin texture, it is more suitable for spring and autumn days.
The second category: fibrous thermal insulation material underwear. Cotton, wool, acrylic, polyester and other fabrics are mostly used, and cotton, wool, camel hair and other flocs are used as filling materials. The utility model has the advantages of good air permeability and moisture conductivity; The disadvantage is that it looks bloated and heavy.
Category III: Space cotton thermal underwear. The fabric is made of cotton, wool and chemical fiber, and the inner sandwich flocs are plated with metal film. Its advantage is to keep warm and prevent radiation; The disadvantage is poor air permeability and moisture conductivity, and there is a silk sound when wearing.
Category IV: thermal underwear with ICCP material in the interlayer. It uses cotton, wool, silk, Lycra and other fabrics, and the ICCP material in the interlayer has also developed from non porous to porous to reticular film. The fixation between the fabric and the interlayer is also bonded by glue to compound by special process.
Category V: comfortable and health care thermal underwear. Such products claim to contain far-infrared fibers and more than 20 trace elements. Far infrared can convert energy in the body and mediate body immunity.
Category 6: silk thermal underwear. Traditional silk thermal underwear (commonly known as silk padded jacket) is filled with silk, which has the characteristics of green and healthy, light and soft, smooth and warm.
