DISPOSABLE filters. Maximum duration of use: 8 hours. This duration varies according to the level of clogging and humidity. A one-month pack consists of a set of 60 filters.
They are made in France and are certified by the DGA (French Armament Procurement Agency).
1 Month Pack = 60 Filters
3 Months Pack = 180 Filters
1 Year Pack = 720 Filters