The masks consist of 3 layers:

• Layer 1 is made of a breathable polyester material and is printed with the Brunswick pattern.

• Layer 2 is made of a breathable cotton material with hygiene certificate.

• Layer 3 consists of a breathable material consisting of silver ions with special bactericidal properties (certificate exist).

The masks are washable.

However, the silver ions lose their bactericidal properties after about 20 wash cycles.
Of course you can use the masks after the 20 wash cycles but without the bactericidal properties.

Note:

The masks do not meet the standards for hospitals and do not provide the same protection as an FFP certified mouth and respiratory mask.