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Filter Mask

Filter mask

A filter mask, also known as a gas mask, was a type of breathing apparatus. It was capable of automatically eliminating all substances injurious to humanoid life, including both chemical and bacterial agents in the atmosphere.

The Ferengi invaders of Enterprise NX-01 in 2151 used filter masks while aboard that vessel, to prevent themselves from inhaling the gas they used to render the crew unconscious. (ENT: "Acquisition")

In 2269, James T. Kirk introduced the Troglyte population of Ardana to this technology, in an attempt to release them of the effects of breathing in harmful gas while mining zenite. (TOS: "The Cloud Minders")

Later that year, members of a USS Enterprise landing party wore gas masks while Leonard McCoy sprayed his great-great-grandfather's weed spray on the swoopers attacking them on Phylos. (TAS: "The Infinite Vulcan")

In 2381, a filter mask was among the items in Kerner Hauze's collection. It was on display when the collection was being catalogued by an away team from the USS Cerritos. (LD: "Kayshon, His Eyes Open")

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