A three-compartment garment that can be placed quickly on a patient in severe hypovolemia or with a suspected pelvic fracture. When the compartments are inflated, they compress the abdomen and legs, limiting the blood flow into these areas and preventing pooling of blood and fluid in the underlying tissues. The value of the device in improving long-term survival has been questioned; therefore, these garments are no longer used as frequently as they were in the past. Also known as MAST (military antishock trousers).