Mask & Face Covering guidance

Wearing Mask in Public Transport
Crowd of People with masks

 Masking FAQ

Masks in Classroom

CDC Science Brief: Masks

Know which Masks Provide the
Best Protection Against COVID-19:


  • Fabric mask with at least 2 to 3 cloth layers.


  • Double mask          (surgical + cloth)

  • Fitted medical mask (surgical mask)


  • N95 (also best for wildfire smoke)

  • KN95

  • KF94


The boxes above provide a general guide.  Choose the face covering that's right for you based on risk, desired level of protection, and personal preference. 

  • Masks should completely cover the nose and mouth and fit snugly against the sides of face without gaps.

  • It is especially important to wear a mask when you are indoors with people you do not live with and              when you are unable to stay at least 6 feet apart since COVID-19 spreads mainly among people                   who are in close contact with one another.

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DO NOT combine two disposable masks. 

Disposable masks are not designed to fit tightly and wearing more than one will not improve fit.

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DO NOT use a KN95 with any other mask. 

Only use one KN95 mask at a time.

The information included on this page does not take the place of medical advice from your provider.

Review current CDPH guidelines for a list of conditions and populations exempt from masking recommendations and requirements. 

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