3D Design:There is an air file in the middle layer of our 3D interlock fabric. This air gap significantly prevents air and particle transfer. Although our masks have a porous surface like other masks, the air gap in the middle layer acts as a barrier against passages, air and liquid.Caring for your Face Covering:This face covering can be handwashed or machine washed daily after use. This helps protect nature, and reduce waste. There is no deterioration in the product from frequent washing. The masks can be ironed. Our masks take on the form of the wearers face perfectly due to the nature of the fabric.