At the time of writing I have not in fact received what I ordered. However, I have been using the Regular Gill Mask (for about 2 years) and the Pro (for about 2 months), I think I am in a position to say the latter has become my ideal mask. The Pro is to me ideal because it is indeed breathable, to the extent that I can actually jog with it on my face. Compared with the Regular the air intake of the Pro feels like it has been doubled. Since the Pandemic I must have looked at more than 100 masks. The Gill Pro has become my ideal mask considering the level of protection and comfort provided and value for money.