The lifespan of your Viper masks filters depend on many factors such as exposure levels, environmental conditions and so on.

We highly recommend replacing the filter sets of your Viper mask at least every 30 days (if used intermittently) or sooner as a general guideline.

Always store unused filters in a clean, airtight container and in a dry environment to preserve their effectiveness. When in doubt, it’s safer to replace your filter too early rather than risk extended use of an over-saturated one.