Survivair® Gas/Vapour Respirator Cartridges• Designed to offer low inhalation resistance for easier breathing and less fatigue• Low profile won't interfere with vision• Sold in pairsSurvivair® Combination Gas/Vapour/P100 Filter Respirator Cartridges• Designed to offer low inhalation resistance for easier breathing and less fatigue• Low profile won't interfere with vision• Sold in pairsCartridges:  Organic Vapour, Organic Vapour / Acid Gases, and Acid GasCartridges/P100 Filter Combo:  Organic Vapour, Organic Vapour/Acid Gas, and Multi-Gas