Woman: I can actually see a lot more without the perisnorkel.
How about a mask that just has a periscope for one eye so you can see above and below the water at the same time and a tiny mirror to look behind you. It would be a hemiperi-semiretrosnorkel.
November 07, 2013
How about a mask that just has a periscope for one eye so you can see above and below the water at the same time and a tiny mirror to look behind you. It would be a hemiperi-semiretrosnorkel.