I decided to go for a little sunset dip this evening just to play around with a new flashlight to 25' and wouldn't you know it... There are dangers in the air!!! I was happily floating and deeply relaxed when I went to take a breath and >SsssssssUCK!< Mosquito right down the snorkel and into the throat! After chugging a few quarts of lake water to wash it down I noticed there were millions of them all around my head. Rats. That ended that little session. I am thinking I will rubber band a piece of screen to the tip of the snorkel if I try this again.