MOPP 2 -- Overgarment and overboots worn; mask/hood and gloves
MOPP 3 -- Overgarment, overboots, mask/hood worn; gloves
MOPP 4 -- Overgarment, overboots, mask/hood, and gloves worn.
In addition to the five MOPP levels, commanders have a mask-only
option. Personnel do not need to wear protective overgarments or
rubber gloves as long as they are protected from direct skin exposure
to liquid or solid contamination (for example, inside shelters). The
Summary of MOPP Levels
Because biological agents cause diseases in humans, defenses against
the agents are similar to those taken for any disease. These measures
discipline as a protective measure. A healthy body can fight off
germs. When the tactical situation permits, personnel should wash
themselves and their uniforms with soap and water and keep their
personal equipment in the best possible condition. Clothing should be
worn buttoned up to protect against insect bites.