Diving Mask, Full Face 05
Diving Mask, Full Face 05 : Features: (3) Full Face Mask Configurations: (3. 2) With A Small Mouth-And-Nose (Oronasal) Breathing Mask Inside The Full-Face Mask: With a small mouth-and-nose (oronasal) breathing mask inside the full-face mask, the dead space is less, and there is less space to needing to be blown empty if the mask floods. But the smaller space around the mouth increases the gas-mask-like distortion of speech
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