Which type of protective gear does NOT offer protection against radiological hazards?

The type of protective gear that does not offer protection against radiological hazards is the category that explicitly addresses radiological dangers. Radiological protective gear is specifically designed to shield individuals from radioactive materials and exposure to harmful radiation.

While impact, thermal, and respiratory protective gear serve critical functions in safeguarding firefighters from various risks, they do not address the unique threats posed by radiological hazards. For example:

• Impact gear is focused on protecting against mechanical forces, such as falls or collisions, which do not relate to radiation exposure.
• Thermal gear is designed to shield against extreme temperatures and fire, not against radiation.
• Respiratory gear protects against inhalation of harmful particles or gases but is not tailored for filtering out radioactive particles.

Therefore, the correct answer directly identifies the type of gear that does not align with the needs for radiological protection, indicating its specific focus and design limitations compared to other forms of protective equipment.