waterwraith
Contributor
I also have the atx50 and a full beard and mustache but my mask (ocean master z2) does not fill up with water when I am vertical. I had a hard time finding a mask that would seal around my mustache. The ocean master is by far the best one I have tried I get some seapage but its really slow and when it builds up the mask's purge is top notch. The purge on the mask does not get pushed up into your nose when you have a reg in your mouth, which is a pleasent change from other masks I have used.