So one question coming out of this announcement. 

Does the initial ASTM Level One approval of the Trebor masks include the ZEN coating on the disposable filter disks?  My understanding up until today was the Zen ink was only going to be applied to the disposable filter material.  It seems this amendment to the Health Canada application applies to the whole reuseable plastic mask surface.  I am thinking that the anouncement may be suggesting an expanded application of the Zen ink on the Trebor masks.  Since the disposable filters don't come into contact with human skin except when replacing them it would seem the concerns with skin contact should be less than with the mask body.