Words to Describe respirators

How respirators often is described ("________ respirators")

• filtered
• modern
• respiratory
• cycled
• organic
• negative
• intermittent
• particulate
• civilian
• adequate
• primitive
• automatic
• most
• type
• pressure
• infant
• demand
• chest
• face
• filter
• powered
• dispersoid
• suitable
• ordinary
• box
• surgical
• appropriate
• use
• supplying
• artificial
• chemical
• crude
• mechanical
• full
• approved
• disposable
• sophisticated
• thick
• purifying
• reusable
• supplied
• facepiece
• personal
• portable
• paniculate
• certified
• line
• positive
• fitting
• air
• protective
• controlled
• wool
• fume
• available
• effective
• wear
• proper
• ready
• uncomfortable
• efficient
• whooshing
• special
• limited
• gas
• industrial
• cartridge