These pants protect workers from hazardous dry particulates and non-hazardous liquid splash and spray. Dry particulates are larger in size than aerosols and include dust and dirt. Splash is non-pressurized or lightly pressurized when it contacts a garment, while spray is pressurized. Pants are worn over personal clothing to protect the bottom half of a worker from contaminants and dirt. They are often worn with shirts to provide full body coverage in place of a coverall when heat stress is a concern or when the gap between the garments doesn't pose a risk for workers.