My biggest feedback on fitment of a variety of faces is that the nostrils almost always leak air and blow into your eyes when you exhale. So I am working on an optimal shape and double D seal for around the nose that is both effective and able to be customized for the individual user.

Please Like (and follow for more exciting updates) as Seed Grant Money will make or break the success of this project for Hackaday Prize 2020

Please Like (and follow for more exciting updates) as Seed Grant Money will make or break the success of this project for Hackaday Prize 2020

here is Version 3 , overall the whole frame has been thinned to around 3-4mm thick. In the end I believe it will be thinned one more time. The nostril  needs adjustment and the slots for strapping need to be added.

Please Like (and follow for more exciting updates) as Seed Grant Money will make or break the success of this project for Hackaday Prize 2020