To use this Nella face mask, simply place it over your face and adjust the elastic straps for a comfortable fit. It's designed to protect you from germs, bacteria, and other external harmful factors. When it comes to cleaning, you can wash it up to 20 times with warm water, but remember to hand wash only. After washing, let it air dry. Keep it in a clean and dry place when not in use. This mask is a reusable and eco-friendly option, so you can use it multiple times without harming the environment.