The disposable respirator comes in two types. The most common disposable respirator is the dust filter mask. Use a dust filter mask whenever suspended dust particles are in the air, which occurs during haying, combining, cultivation of dusty fields, the clean-up of dusty barns and when applying lime and fertilizers. Placement of the two straps gives a much better fit. Masks with only one strap typically don't provide a seal.
Fibrous material used in the dust filter mask physically traps particles.
Reusable air-purifying respirators have replaceable filter cartridges. The most common facial types are the half and full face masks. A full face mask covers the nose, mouth and the eyes. If the hazard irritates the skin or eyes, use a full face respirator. Some cartridges come with pre-filters to use with the respirator cartridge.