If your job demands long-term breathing protection, the OptimAir 3000 PAPR [Powered Air Purifying Respirator] is the way to go. Your breathing remains easy and free from resistance even after hours of work. A maximum in safety, flexibility and ease-of-handling lets you concentrate on your work, knowing that your health is not being compromised. Your comfort, well-being and ability to perform effectively are greatly enhanced. Filters also last longer. The microprocessor controlled, variable-speed motor guarantees an optimum amount of air in your head top [mask or hood] – even as your breathing rate changes during more strenuous tasks. In many situations it is not even necessary to maintain an airtight seal. The pressure differential causes airflow to travel continuously from your face to the outside environment, preventing unfiltered air from entering your head top.