Lifeguards and attendees offer a hands on demonstration of how the different types of snorkel masks work, including the increasingly popular full face ones that some say are a problem. (PHOTO BY DENNIS ODA / Star Advertiser)
The Body Glove morning snorkel tour returns to Kailua Pier. Body Glove Hawaii makes customers who want to use full-face snorkel masks on their trip sign a waiver. (Laura Ruminski/West Hawaii Today)
The Fair Wind II launches from Keauhou Bay. Fair Wind Cruises are one of the boat tour companies on Hawaii Island that have banned their customers from using full-face snorkel masks. (West Hawaii Today/File Photo)
KAILUA-KONA As concerns rise about the safety of full-face snorkel masks, more and more Hawaii Island tour companies are following the example of their island neighbors by banning the use of the masks on their boats.