FFP masks Air Seal Reusable FFP masks with foam sealing lip and folding filter. Air Seal FFP masks have a full sealing lip made of soft foam. This provides a particularly comfortable seal, can be wiped and disinfected. Air Seal masks can be used multiple times, reducing waste and overall costs. The AirWave® folding filter technology allows for a particularly large filter area to be accommodated in the masks. This means that they have long-lasting low breathing resistance for easy breathing. A skin-friendly non-woven fabric on the inside of the mask and the knitted band promise additional wearing comfort. Our flexible ActivForm® 3D design automatically adapts to the shape and movements of faces. This means that Air Seal masks fit tightly and comfortably, simply and without a nose clip. The DuraMesh® mask grid keeps the FFP masks in shape even under the toughest conditions. Air Seal FFP masks reliably protect against particles and are available in protection class FFP3.