Fit is important for all mask types

Avoid loose or gaping masks. When worn properly, a mask should:

- cover the nose, mouth and chin without gaps

- not allow air to escape from edges

Improve mask fit by:

- adjusting the ties, bands or ear loops and the flexible nosepiece

- tying knots in the ear loops

- tucking the sides of the mask so that it lies flat

- using a mask fitter or brace

No matter which type of mask you use, proper fit is a key factor in its effectiveness.

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