Review on Unigear Full Face Snorkel Mask - Panoramic 180° View with Advanced Safety Breathing System, Snorkel Set for Adults - Anti-Leak, Anti-Fog & Safe Breathing by David Edwards

When I first used this mask I really liked it. It's really nice - easy to use, NO LEAK (that never happens!), NO FOG (a dream come true) and really expands the field of view. But if, like me, you stay in the water for more than 4 hours while snorkeling, this mask may tire you. The suction pressure around your head starts to take its toll, your head starts to hurt and you have to breathe heavily. Needless to say, my lungs were working pretty hard. While overall I like it better than your traditional whistle, it's not practical for long hours. That said, next time I'll take a normal spare tube next time this mask tires me out. Especially if you like diving, I recommend this option.