Full face masks are believed to be the cause of numerous deaths.

An investigation has been launched into the safety of the full face snorkel masks after at least nine people died, according to KTVU.

At least two of the nine people who drowned over a 13-day stretch were wearing the full face mask.

While an official cause of death has not yet been determined, the mask’s design is raising some serious safety concerns.

The girlfriend to an experience swimmer said she is contemplating a lawsuit against the maker of the masks after her former lifeguard boyfriend died suddenly from a ‘drowning’ incident, shares Daily Mail.

‘I’m still confused as to how this happened. The cause of death is drowning,’ girlfriend to the late Bryan Beyer, Heidi Williams, said in a comment on The Maui News.

Nancy Peacock, another drowning victim from 2016, also died from what her husband believes could be related to the equipment.

Guy Cooper said he’ll ‘never know what really happened’ but if he ‘can somehow prevent it from happening to someone else’ that is what he will do.”

His wife had reportedly been snorkeling prior to her mysterious death while she was wearing the equipment.

The scuba masks can create carbon dioxide buildup, which could cause people to lose consciousness, according to KTVU, who spoke with a merchandiser of the masks.

“You’re breathing really hard but you feel that you’re not getting the breath,” he said, while demonstrating how the mask operates. “So, it’s more I think related to the individual and their anxiety and such rather than the exact design of the mask itself. It’s also possible to have carbon dioxide buildup with a regular snorkel mask as well.”

‘If you dive down, take a big breath, and then go down, the ball comes up and prevents any water from going inside the mask.’

I purchased my son one of these a couple of years ago. Thank goodness he never really liked using it, he does a lot of snorkelling!

I think I will toss it out now.

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