SeaYoda:It looks like the new masks have purges too. They seem to be pointed in a different angle (down instead of back toward the face). I wonder if you could seal the valves closed in order to create some positive pressure?
I have had some interesting effects with masks in the past and maybe my nasal physiology has something to do with my problems. I have been snorkeling before with a mask that had no purge. The mask actually squeezed in on my face so much that it hurt. I kept blowing into it but it kept sucking down on my face.
I have noticed that with the 4.5 dd that I get some squeeze if I don't adjust my regulator up a little. I also have seen the actual leak in the mask (I filled it with water and watched a little river drip out around the top right. I did not get a new gasket with the replacement lens (I never changed it until this week) and the HO rep told me to let her know if I have problems - they could get me a new gasket. These guys are great, they could just sell the mask and leave me to deal with the problems but they haven't. They've been helpful from the start. I'll be looking pretty hard at buying the 3.5 when it becomes available.
A lot of mask I have seen on the market does not have valves, for the hydro mask, do you guys think there is a particular reason why the design need valves? Besides the valves, does the curvature of the mask makes it hard to fit more people, or because the skirt is thin and therefore less cushioning, which makes it harder to fit all? I think when the skirt is thinner then the lens would be closer to face less tunnel vision but it is also harder to form good cushioning.