Care For Your Half-Mask Air-Purifying Respirator Personal Protection Your half-mask air-purifying respirator provides protection against breathing of airborne contaminants. Your employer is responsible for the respiratory program which includes providing you with the proper type of respirator for the given exposure. You and your employer share responsibility for making certain that your respirator is functioning as intended for your protection. The following is a list of general rules to help you care for and maintain your respirator: 1) The disposable filter cartridges usually contain a chemical absorbent to trap contaminants. The filter cartridge should be replaced immediately if it becomes more difficult to...