Underwear materials that are not suitable for people with skin allergies include wool, chemical fiber, nylon and pure cotton textiles containing formaldehyde. Chemical fiber components are easy to rub on the human body and generate static electricity. These static electricity can produce a large number of cations around the human body, which will stimulate the skin, reduce the moisture of the human skin, increase dandruff and cause skin itching. In addition, some artificial fiber thermal underwear has poor air permeability, which is not conducive to sweat evaporation. When sweating, urea and salts in sweat will adhere to the body surface, which will aggravate skin itching. At present, there are many formaldehyde printing and dyeing auxiliaries used in cotton textiles, which may release formaldehyde when worn. Wearing it directly may cause skin allergy. When the concentration of formaldehyde is high, it has a pungent smell, which causes discomfort to eyes and trachea. Long-term exposure to formaldehyde can induce allergies. Hemp (data map) kapok (data map) Xintianjin thermal underwear uses natural fibers such as hemp and kapok, and the effect is remarkable. Soft and comfortable to wear, fine fiber, and warm effect. The moisture absorption is large, so that the warm-keeping products do not generate static electricity and have natural antibacterial effect. Hemp fiber keeps warm well, but it is cool and pleasant in summer. When used in Xintianzhijin Four Seasons underwear products, it has the effects of cooling, antibacterial, mite removal and skin disease prevention. Xintianjin thermal underwear (data map) skin allergy. Wearing underwear made of numb cotton is relaxed, free, breathable, antistatic and antibacterial. It is the best choice for skin care underwear. Xintianjin inherits and develops Tianzhijin's product concept of environmental protection, science and technology and fashion. By applying the original primary skin care factor in the world-new plant fiber numbness cotton, we will create a brand-new series of health care products with professional technology, truly create every day in Tianjin, nourish the skin and live a good life.