Chemical protective suits are one type of protective clothing worn by firefighters. They are utilized during firefighting operations and emergency rescue efforts at scenes involving hazardous chemicals and corrosive substances, providing protection to firefighters against chemical dangers and corrosive materials.

Chemical protective suits can be either sealed or not, depending on the application and the level of danger. All materials used in protective suits must be capable of resisting chemical penetration and degradation. The stitching pattern is also a crucial factor affecting the performance of protective suits; poor handling can leave sufficient gaps in the fabric's needle holes to allow for the passage of microfibers or liquids, thereby reducing the protective performance.

Chemical protective suits are categorized into two types: lightweight and heavy-duty.

Lightweight protective suits are typically made from nylon-coated PVC, weighing lightly and suitable for full-body protection in hazardous environments. They can prevent general acidic and alkaline attacks and do not require breathing apparatus. The weight is generally around 5 kilograms.

Heavy-duty protective suits can be made from multi-layer high-performance anti-chemical composite materials, offering excellent properties such as tear and puncture resistance, abrasion resistance, flame retardancy, heat resistance, insulation, and waterproof sealing. They provide protection against a variety of toxic and harmful liquids, gases, smoke, solids, biological agents, toxic gases, and nuclear contamination.

Airtight protective suits are typically made of neoprene, offering corrosion resistance to a variety of different chemicals and are highly suitable for use in cold or high-temperature environments. Heavy-duty protective suits usually come equipped with respirators, with a weight of around 6 kilograms.