Hello and first thank you for taking the time to help me with my problem. I am trying to prepare for freediving and have hit a snag. I was originally looking into a full face mask but have since found that they are not good for freediving due to several issues including co2 buildup, being high volume, and leaking when under pressure at certain depths to name a few. My problem is that my teeth are not so good for a traditional snorkel. A low volume full face mask seems very doable but I haven't found any company that has tried it. I have seen some suggestions that include not using a snorkel for freediving but that takes some of the surface fun out. Any advice or products you recommend would be greatly appreciated. Thank you all in advance for your help.