Personal protective equipment is an academic concept and research domain concerned with the design, evaluation, selection, and deployment of specialized clothing, helmets, goggles, or other garments and equipment engineered to protect the wearer from injury, illness, or other health hazards. As a field, it investigates material science, biomechanics, human factors, regulatory compliance, and the efficacy of protective barriers against specific environmental, chemical, biological, physical, or mechanical risks, playing a critical role in occupational safety, public health, and risk management across hazardous applications.