How to Wear a Cloth Face Covering From the Centers for Disease Control: https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/diy-cloth-face-coverings.html 

Cloth face coverings should—

• fit snugly but comfortably against the side of the face
• be secured with ties or ear loops
• include multiple layers of fabric
• allow for breathing without restriction
• be able to be laundered and machine dried without damage or change to shape

Information on Respiratory Protection and Personal Protective Equipement (PPE) 

Face coverings are NOT necessarily respiratory  protection.  Face covers are designed to protect others.  However face coverings can provide some respiratory protection.   To learn more about respiratory protection, to  help individuals develop and wear face coverings that better provide respiratory protection and to learn how to use the best repiratory protection procedures see:   https://www.osha.gov/SLTC/respiratoryprotection/

Information from the CDC on using PPE  https://www.cdc.gov/coronavirus/2019-ncov/hcp/using-ppe.html?deliveryName=USCDC_425-DM2674