Masks are 4 ply, lined in the front and back with a high quality interface to filter air coming in and going out. Outer layer and inner layers are 100% cotton for maximum comfort. Pockets are strategically positioned at the sides so filters -or additional masks- can be added if necessary. Masks can be made to secure around the head or around the ears for  your convenience. Each securing method provides the necessary seal around the nose and mouth to keep you and those around you safe.  Machine washable at 30 - 40 degrees Celsius. Wonderful for school, grocery store, bank, doctors office or Apotheke.