The MD3196 is a compact life preserver that automatically inflates when submerged in water. Designed specifically for easy integration with body armor and tactical vests that use a Modular Lightweight Load-carrying Equipment (MOLLE) webbing system, the MD3196 SO offers advanced flotation protection to law enforcement professionals operating in marine environments. For special operations, the life preserver uses a subdued olive green bladder with no reflective tape.Using Hydrostatic Inflator Technology (HIT), the MD3196 SO will automatically inflate within seconds when submerged in 4 or more inches of water and will not inflate prematurely due to rain, humidity or wind-driven sea spray. An oral inflation tube provides backup inflation, if necessary and no inflator maintenance is required for five years from date of manufacture, unless the MD3196 SO is inflated.Upon inflation, it is essential to inspect and re-arm your PFD before next use.;An optional manual conversion cap (MA7219) can be installed on to prevent the automatic operation. This option allows the operator to select the inflation capability (manual or automatic) prior to the mission. The cell can be manually inflated with a simple pull of the beaded handle.