HIT High Visibility Inflatable PFD - Fluorescent YellowGreen - AutomaticManualThe MD3183 T3 Inflatable PFD with HIT Hydrostatic Inflator Technology is Mustang Survivals top-of-the-line inflatable PFD. Constructed of ANSI-approved high visibility materials also worn by police, EMS, and traffic controllers the MD3183 T3 is our brightest inflatable yet.The Hydrostatic Inflator Technology offers reliable inflation in a low maintenance design that will only automatically inflate when submerged in 4 o