LivSafe N95 5PLY Masks are designed for single and multiple use. When the mask gets dirty due to pollution wash the mask and can be reused. To wash mask, put the mask in soap diluted with warm water. Gently knead, clean and dry for a few hours. Please do not soak in water for a long time and do not bleach, so as not to cause mask distortion and reduce the filtration effectiveness. N95 Reusable Virus Protection Mask is a protective device with high filtration efficiency to airborne particles. To provide the requisite air seal to the wearer, such masks are designed to achieve a very close facial fit.