Welding suits, extreme workers’ workwears generate sweat odor / various odors, and volatile organic compounds (VOCs), formaldehyde (HCHO) and harmful heavy metal ions that occur during operation have a serious effect on workers. Diseases such as skin diseases are caused by bacterial propagation in welding suits and work clothes. The surface of welding suit and extreme workers’ workwear to which weltouch®, a surface treatment technology that generates oxygen anion and negative charge, is applied protects workers not only by the deodorizing and antibacterial activity but also by reducing the harmful heavy metal ions included in the weld fume harmlessly