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2. Elastomeric respirator - Wikipedia

   en.wikipedia.org/wiki/Elastomeric_respirator

   Elastomeric masks must be individually fit-tested and inspected for full efficacy. [2] They may be somewhat easier to fit than filtering facepiece respirators. Older mask designs were designed only to fit young adult men of average weight and a narrow range of ethnicities; newer ones use updated anthropometry and fit more people. [5]

3. 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 ...

4. Breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/Breathing_apparatus

   The half-mask extends below the chin, and the full-face mask covers the eyes as well as the nose and mouth, and can have a dead space so large that an inner orinasal mask is provided to reduce the dead space. A diving half-mask used in scuba and freediving covers the eyes and nose, and is not breathing apparatus.

5. Respirator fit test - Wikipedia

   en.wikipedia.org/wiki/Respirator_fit_test

   Fit test in US Navy. The effectiveness of various types of respirators was measured in laboratories and in the workplace. [3] These measurements showed that in practice, the effectiveness of negative pressure tight fitting respiratory protective devices (RPD) depends on leakage between mask and face, rather than the filters/canisters. [4]

6. Knowing your sleep chronotype can lead to better rest and health

   www.aol.com/knowing-sleep-chronotype-lead-better...

   This chronotype prefers to go to bed at around 11 p.m., according to the Sleep Foundation report. Bears account for around 55% of individuals. Wolf chronotypes are similar to "night owls."

7. Experts Warn Against Viral "Sleepmaxxing" Trend - AOL

   www.aol.com/lifestyle/experts-warn-against-viral...

   Here's a scenario of what "sleepmaxxing" could look like: covering yourself in a weighted blanket and using mouth tape after taking melatonin as a white noise machine is on in the background and a ...