Using your Nella Anti-Bacterial 2-Layer Face Mask is easy. Simply place it over your nose and mouth and adjust the elastic straps for a comfortable fit. This mask is designed to protect you from germs, bacteria, and other harmful external factors. When it comes to cleaning, you can wash it up to 20 times with warm water. Make sure to use hand wash only. After washing, let it air dry. Don't use harsh chemicals or machine dry the mask as it may damage the anti-bacterial properties and the material. Keep it in a clean and dry place when not in use. This way, your mask will continue to provide you with reliable protection and comfort.