- Wash your hands for 20 seconds with soap and water (or use an alcohol-based sanitizer) before putting your face mask on. - Make sure it covers the nose and mouth. - Small gaps are normal and unavoidable, but the fewer there are and the smaller they are, the better. - Wash it in warm and soapy water after each use and dry.
Your face mask has about 15 x 20 cm. The elastics are adjustable so you can feel more comfortable.