Flowtech has a unique design to allow you to breathe naturally and comfortably. Using two chambers and 4 intake valves allows air to circulate in and out freely. Using one-way valves and a separate breathing chamber ensures fresh air is always circulating through the mask. Flowtech provides 50 percent easier work of breathing compared to other full face snorkeling masks on the market. This combined with safe levels of CO2 make this the best full face snorkel mask
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