This is a premier Fridaze brand 100% wrinkle-resistent linen mask crafted with hand made tailoring. Your mask can be machine washed and dried, though hand wash is recommended. The color and shape of your mask will stay beautiful and comfortable, wash after wash. Each mask comes includes one PM 2.5 activated carbon filter, adding additional filtration and protection. The filter slides easily in and out and is recommended to be changed 1-2 times a week, depending on usage. Replacement filters are available for purchase, and additional details are listed in the replacement filter product information.