Particle Pre-Filter for Swiss Air Respirator – Set of 50

Set of 50 pre-filters for the 4700.010 Swiss Air PAPR (powered air-purifying respirator) system. Serves as a protective preliminary filter for the 4088.400 particle filter. Pre-filters are designed to extend the life of your particle filter. For best results, change your pre-filter often. Compatible with Swiss Air PAPR only. Not compatible with the e3000x PAPR.