Particle filter is equipped with a special hydrophobic P3 class filter element which has been classified as P3 D R (D–dust) based on dust absorption capacity tests. The filter element is made of micro-fiber  filter paper. The fiber density works like a very fine mesh which reliably captures the finest particles including aerosols, smoke, micro-organisms (bacteria, viruses, spores, etc.) and highly- toxic particles.

The filters are produced with standard round threads according to STANAG 4155 (EN 148- 1)- Rd 40x1/7". The filter components are made of hard plastic. This results in a very robust product that is extremely durable against shock and impact damage in operational use.