This document provides an overview of requirements for shipping hazardous materials as defined by the U.S. Department of Transportation (DOT) Hazardous Materials Regulations. It discusses the classification of air bag modules and inflators as either Class 9 or Division 2.2 materials depending on whether they contain pyrotechnic or compressed gas components. The summary also outlines the information that must be included on hazardous material shipping papers such as the proper shipping name, UN number, hazard class, packing group, quantity, and 24-hour emergency contact number.