These in-line filters reduce risk of infection and block saliva and moisture from entering a sip/puff switch. Supplied in a packet of 6.
This Sub-Micronic In-Line Filter helps prevent infection. It is a hydrophobic filter which will not pass water and has a pore size of .2 PTFE. When used with any Sip and Puff Switch, this unique filter will trap saliva, germs and mucous.
It does introduce a small air flow restriction, so may not be suitable for people with very weak breath.
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