This cheap device, at under £4, is designed to easily fit in, and be removed from, inside a heavy duty breathing mask. To help with sanitation and reduce risk if transferring infections for multiple users using the same mask.
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SANITATION
This cheap device, at under £4, is designed to easily fit in, and be removed from, inside a heavy duty breathing mask. To help with sanitation and reduce risk if transferring infections for multiple users using the same mask.