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2. Full-face diving mask - Wikipedia

   en.wikipedia.org/wiki/Full-face_diving_mask

   A diver in a pool wearing an AGA full face mask A diver wearing an Ocean Reef full face mask Head protection helmet for use with Ocean Reef full face diving mask. A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. [1]

3. Diving mask - Wikipedia

   en.wikipedia.org/wiki/Diving_mask

   A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including scuba divers, free-divers, and snorkelers, to see clearly underwater. [1] [2] Surface supplied divers usually use a full face mask or diving helmet, but in some systems the half mask may be used. [2]

4. Snorkel (swimming) - Wikipedia

   en.wikipedia.org/wiki/Snorkel_(swimming)

   A full-face snorkel mask may be considered as combining the technology of tube snorkels and gas masks, and to a considerably lesser extent, of full-face scuba masks, which combine the technology of gas masks and scuba regulators, but the snorkel mask does not contain a pressure reducing mechanism for breathing gas, and is not intended for use ...

5. List of headgear - Wikipedia

   en.wikipedia.org/wiki/List_of_headgear

   See Mask for a fuller list of masks. Balaclava (helmet) or ski mask; Battoulah; Bongrace – a shade for the face, sometimes part of a hood, or a separate garment worn with a hood or coif; Tudor/Elizabethan; Boushiya; Burqa, also burka, burga, burqua; Diving mask; Full-face diving mask; Gas mask; Orthodontic facemask

6. Snorkeling - Wikipedia

   en.wikipedia.org/wiki/Snorkeling

   Integrated snorkels must be fitted with valves to shut off the snorkel's air inlet when submerged. Water will otherwise pour into the opening at the top and flood the interior of the mask. Snorkels are attached to sockets on the top or the sides of the mask. New-generation snorkel masks are full-face masks covering the eyes, the nose, and the ...

7. Predator (fictional species) - Wikipedia

   en.wikipedia.org/wiki/Predator_(fictional_species)

   Its technology and weaponry similarly reflect this primitive approach, eschewing plasma-based projectiles in favor of metal spear tips and arrows, and its face mask is of a more bone-like material rather than the smooth steel of later examples of its species. The mask functions identically to the ones worn by the later visitors to Earth.