Review on Cozia Design Adult Snorkel Set - Full Face Snorkel Mask With Panoramic 180° View, Adjustable Swim Fins, Anti-Fog And Leakproof Scuba Mask For Optimal Snorkeling Experience by Mike Ramani

The system is basically flawless, I only have two complaints. Due to the style of breathing, you'll need to make a lot of deep, rapid breaths which may be uncomfortable for some users. The other is that if you tilt your head back (such as floating on your stomach looking down, then tilt your head up perhaps to listen to instructions from a dive instructor) a device in the snorkel seals everything so water doesn't get in. It's a really good idea, but if you were mid-breath (like you almost always are) it can catch you by surprise.Otherwise it was one of the best coral reef times ever, the vision was clear and the fins were comfortable. I hate goggle fog so this was a great adaptation.