This KN95 face mask is designed with a one-way exhalation valve, to help you breathe easier, it comes with up to 95% filtration by covering the mouth and nose. Adjustable nose clip embedded and elastic ear loop can fit most people. Convenient ear loop design allows you to slip on and remove your mask quickly and easily. This mask should be replaced regularly, and the long term used is not recommended, it is suggested to stop using it if there is any discomfort or adverse reactions in the process of wearing. This mask is not washable, please ensure that it is used only within the valid period. Store in a dry, ventilated place and stay away from fire and flammable materials.