Md. Tanvir Hossain presented on head protection in construction sites. The presentation covered causes of head injuries such as falling objects or debris, striking fixed objects, and electrical hazards. Without head protection, injuries can range from permanent disfigurement to death. Hard hats are classified by type, providing protection to just the top of the head or the top and sides, and by class based on impact resistance and electrical insulation. The presentation recommended always wearing the proper class of hard hat for the work being done to minimize risks to the head, the most sensitive part of the body.