US Patent 11412790 Perfumed dust mask

A face mask comprises a container coupled to a first surface of a face mask, a fragrance material disposed in the container, and an exhalation valve coupled to a second surface of the a face mask. The fragrance material comprises a fluid configured to evaporate from the fragrance material, and the container is configured to releasably engage the exhalation valve to form a closed chamber. The closed chamber is configured to enclose the fragrance material when the container is releasably engaged with the exhalation valve.