The design is made to fit the mask as closely as possible to the face. It has no crease – pockets, where dirt can accumulate. It also makes the mask easy to care for, reusable. A protective mask does not protect against the risk of infection with the virus. However, when used properly, it will serve as an additional barrier to the airways during the day. The face mask should be removed as soon as it becomes wet or after 2 hours of use. Made of 100% cotton. Material description: two layers – outer and inner. Both are made of 100% certified organic Cotton.