Filters typically last 3 to 4 months of regular, 8 hours per day use but are dependent on what kind of use. Consider a subscription to always maintain a safety stock of filters.
Compatibility: AIR filters are compatible with AIR Super Mask. They are not Compatible with AIR2 Super Mask.
The filters were shipped right away. I was given a two week time frame to expect my helmet. They had a parts shortage and now I do not know when the helmet will come in. I needed the helmet ASAP due to going from distance learning to returning to the classroom.