Answer
Jun 15, 2020 - 06:02 PM
Hi Keith, this mask is not positive pressure, it has a pneumatically balanced second stage integrated and will breath the exact same as a scuba regulator would . You can find the size chart here for measuring for the mask: https://diving.oceanreefgroup.com/wp-.... If you have any more questions, please feel free to email me direct at augiej@diverightinscuba.com.
--Augie
--Augie
