Product is a disposable sterile product, which is mainly consisted of paraffin and gauze. Paraffin is not hydrophilic and can not be absorbed, when cover the wound, it protects and isolates the wound to make the water in the wound not volatile, and keeps skin moist, prevents wound contact with the bacteria in the air. Paraffin gauze dressing does not adhere to the wound when change wound dressing, can effectively avoid the wound to secondary injury.