contingent. 1  dependent for existence, occurrence, character, etc., on something not yet certain; conditional (often followed by on or upon): Our plans are contingent on the weather. 2  liable to happen or not; uncertain; possible: They had to plan for contingent expenses.
Get a brush. Face masks are best applied with a soft-bristle brush, such as a paintbrush (normally used for art making) or a tint brush (normally used to apply hair dye). Invest in a brush that you will use for this purpose, and be sure to clean it when you are done.
The simple face mask (SFM) is a basic disposable mask, made of clear plastic, to provide oxygen therapy for patients who are experiencing conditions such as chest pain (possible heart attacks), dizziness, and minor hemorrhages. It is often set to deliver oxygen between 6-10 litres per minute.