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2. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   Facepieces come in many different styles and sizes to accommodate all types of face shapes. A full facepiece covers the mouth, nose and eyes and if sealed, is sealed round the perimeter of the face. Unsealed versions may be used when air is supplied at a rate which prevents ambient gas from reaching the nose or mouth during inhalation.

3. How Much Do Masks Really Cost? From Cloth to KN95, Here ... - AOL

   www.aol.com/much-masks-really-cost-cloth...

   The CDC recommends finding a cloth mask that has two or more layers of breathable fabric that fits snuggly against the sides of your face. You can find a pack of two fabric masks for as low as $4. ...

4. Elastomeric respirator - Wikipedia

   en.wikipedia.org/wiki/Elastomeric_respirator

   mouth-bit respirators, which fit in the mouth with the nose pinched shut (escape only) quarter-mask or orinasal mask, covering the mouth and nose only; half-mask, from below the eyes to below the chin; fullface mask, from above the eyes to below the chin; Some elastomeric masks include one-way valves to let exhaled air out unfiltered.

5. Cloth face mask - Wikipedia

   en.wikipedia.org/wiki/Cloth_face_mask

   A cloth face mask is a mask made of common textiles, usually cotton, worn over the mouth and nose.When more effective masks are not available, and when physical distancing is impossible, cloth face masks are recommended by public health agencies for disease "source control" in epidemic situations to protect others from virus laden droplets in infected mask wearers' breath, coughs, and sneezes.

6. Orinasal mask - Wikipedia

   en.wikipedia.org/wiki/Orinasal_mask

   An orinasal mask, oro-nasal mask or oral-nasal mask [1] is a breathing mask that covers the mouth and the nose only. It may be a complete independent item, as an oxygen mask , or on some anaesthetic apparatuses, or it may be fitted as a component inside a fullface mask on underwater breathing apparatus , a gas mask or an industrial respirator ...

7. Breathing mask - Wikipedia

   en.wikipedia.org/wiki/Breathing_mask

   Full face diving mask, watertight masks covering the eyes, nose and mouth, allowing the wearer to breathe underwater from a self-contained or surface-supplied breathing gas supply; Band mask, a heavy duty full-face diving mask for surface-supplied diving; Diving helmet, covering the entire head in a dome of air. By coverage