PPRuNe Forums - View Single Post - MOL on protracted slot at 20.00 on the 22nd. MASKS.
Old 23rd May 2020, 09:08
  #11 (permalink)  
Join Date: Oct 2019
Location: Here
Posts: 14
Originally Posted by OPENDOOR View Post
Is there any research that shows oxygen masks would become ineffective if worn over a face mask?
From personal experience (not related to COVID), they are still effective.
jimmievegas is offline