Respiratory protection includes devices and management techniques for keeping people safe from hazardous materials. This handbook presents the state-of-the-art in respiratory protection technology as well as best management practices for work centers. Included are topics relevant to industry, government, and healthcare that provide guidance and tools for ensuring the best possible protection for workers. Most books on this topic are at least 20 years old. Research, technology and management techniques have advanced over the past two decades. This new handbook is needed to provide updated information relevant to today’s occupational needs for industrial hygiene and safety professionals.