These smocks protect workers from non-hazardous dry particulate s and non-hazardous liquid splash and spray. Dry particulate s 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. Smocks have sleeves and overlapping front panels to cover a worker's front, arms, and back. They are knee length or longer.