Mission oriented protective posture (MOPP) is a flexible system used to direct the wearing of chemical protective garments and mask to balance mission requirements with the chemical warfare agent threat. Wearing chemical protective garments and mask provides individuals protection against most known chemical warfare agents, biological agents, and toxins. In MOPP Level 0 individuals carry their protective mask while their remaining MOPP gear must be readily available (e.g., within the work area, fighting position, living space, etc.) In MOPP Level 1, individuals wear their overgarment and carry the rest of their MOPP gear. For MOPP Level 2, individuals wear their overgarment and overboots while carrying the mask with hood and gloves. At MOPP Level 3, individuals wear their overgarment, overboots, and mask with hood, but not the gloves, and at MOPP Level 4, individuals wear all their MOPP gear. During the Gulf War, commanders could raise or lower the amount of protection through five levels of MOPP. In addition, commanders, under certain situations, could exercise a mask-only option