This is a reusable fitted style mask with two layers of fabric. The lining is a cotton fabric for comfort against the face and a PUL fabric to prevent germs from getting through. It is pocketed to be able to use a filter. Can be used without one too. Comes with elastic but can be easily used with ties if you have them. Fits - Adults This can be washed in hot water. Tip:  wash in a delicates netted bag to keep it from wrapping around other laundry items.It has been suggested by the specialists that masks should be washed daily - by hand or machine and air dried, preferably in the sunshine which is a natural germ killer.