Nasal filter

A nasal filter comprising:

• a first rim portion having a shape configured for contacting and being latched on a perimeter of a user's nostril;
• a first crease portion provided in the first rim portion, the first crease portion comprising a plurality of concentric ring-shaped creases in increasing diameter and collapsed flatly for storage into a first plane defined by the first rim portion and deployed into a conic or circular pyramid shape configured to fit in the user's nostril when pressed perpendicularly to the first plane;
• a second rim portion having a shape configured for contacting and being latched on a perimeter of the other nostril of the user;
• a second crease portion provided in the second rim portion, the second crease portion comprising a plurality of concentric ring-shaped creases in increasing diameter and collapsed flatly for storage into a first plane defined by the first rim portion and deployed into a conic or circular pyramid shape configured to fit in the user's nostril when pressed perpendicularly to the second plane;
• and
• a bridge portion connecting the first rim portion to the second rim portion,
• wherein the nasal filter is configured to be deployed into the user's nostrils and to provide a filtering of breathed-in air.